"Fantastic Voyage" Plot

"What kind of bloody vessel is this?"

"Fantastic idea for a movie. Terrible idea for a proctologist."

— The Twelfth Doctor, Doctor Who, "Into the Dalek"

A plot that involves characters being shrunk to enter someone's body. Usually animated. Travel is often via submarine and scuba variants. Lighting is rarely a problem. Often has a time limit parameter, where either the person the characters go inside has a very short amount of time left to live, or the shrinking is temporary and the characters must accomplish their mission and get out before they kill the person by returning to normal size while inside of them. There will be at least one scene of just barely squeezing through some sphincter or valve as it closes. If there's a scene inside the stomach, expect to see random inedible objects scattered around for comedic effect (even if the character isn't an Extreme Omnivore) and/or food that has been swallowed whole that would normally be too large (such as whole burgers or hot dogs). These items tend to make handy platforms for any body explorers lacking a submarine, since shrunken characters usually suffer instant death upon contact with stomach acid (either that or they are completely immune). Protagonists being menaced by Seeker White Blood Cells, Monstrous Germs and/or giant tapeworms (well, giant to them) is also common.

For some reason, visibility is almost never an issue in these adventures, even though the inside of your body would be pitch black, unless fictional humans all have an ambient light organ somewhere in their torso. Also, if the character enters the body by being swallowed, don't expect them to come out through the other end. Alternative exit points typically involve being sneezed, burped, or cried out, whether by request to the host or through involuntary means.

See also Incredible Shrinking Man. If there are normal-size invaders inside a giant body, then you have been Swallowed Whole. Curiously, giant bodies tend to be filled with large open spaces for movement and even extended travel within, even if one was swallowed.

Named for the granddaddy of them all, a movie co-starring Raquel Welch, which also spawned its own Animated Adaptation. An episode with this plot will usually contain some kind of direct homage to or parody of said film — a favourite being the infamous Clothing Damage scene. Bizarrely, the titles of such episodes surprisingly often reference Journey to the Center of the Earth instead, with the person's name or a noun that describes them in place of "the Earth".

Not to be confused with the funkarific song by Lakeside. Or Coolio's 1994 hit sampling it. Sometimes, characters can go into a robot's body as well, to resolve a Glitch Episode.

Compare and contrast with Journey to the Center of the Mind, Ghost in the Machine, Animate Body Parts, Anthropomorphized Anatomy, and Brain with a Manual Control. If somebody's body just happens to be the Adventure Town this week, you're probably just flying in a Womb Level.

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Examples:

Anime and Manga

• The original Astro Boy anime had the episode "Mighty Microbe Army", which actually predates the original Fantastic Voyage by three years. According to Frederick Schodt's book The Astro Boy Essays: Osamu Tezuka, Mighty Atom, and the Anime Revolution, Fox actually wanted to steal a couple of Osamu Tezuka's plot elements from the episode, but never credited him for it.
• The Doraemon 1979 anime's episode "Big Pinch, Shizuka-chan!" features Doraemon and Noby going inside Sue after she accidentally swallows a candy which was actually a prize for a trip to Switzerland. In the original chapter 182 of the manga ("Inside the Stomach, Inside the Water") and the remake from the 2005 anime ("Even Though It's Inside the Stomach Acid"/"Noby's Tough to Stomach"), it's instead an opal that was part of her mother's $5000 dollar wedding ring and was in Sue's peanuts that she was eating.
  • There's also “Go to the Doctor, Doraemon!”, where Doraemon breaks and Noby has to fix him from the inside.
• In Dragon Ball Z, during the fight versus Buu, Goku and Vegeta (fused together as "Vegetto") get absorbed by Buu, unfuse, and end up travelling through the villain's body so they can rescue their allies.
• Dr. Slump: In Chapter 89/Episode 61 in the 1981 anime and Episode 22 in the 1997 anime, Dr. Goat shrinks Senbei, Arale and Gatchan to very small proportion with the Big Small Ray Gun and has Midori swallow them. Hazards include fighting a mosquito and exiting Midori's body before they enlarge.
• Galaxy Angel has an episode where the team needs to enter Volcott's body because of some strange thing that make him change his body into several crazy stuff. Mint got haywire and it turns even crazier, which in the end result in Volcott turning into a baby.
• Due to some extremely trippy Applied Phlebotinum, the final battle of the IL arc of Get Backers takes place inside the opponent's body. Thus, hitting Makubex (who was in there with them...) caused the whole landscape to warp and shake.
• Gintama: The Tama Quest Arc which is also a parody of the Dragon Quest game franchise.
• In the third part of JoJo's Bizarre Adventure, when Steely Dan implants his microscopic Stand, Lovers, into Joseph's head, Polnareff and Kakyoin shrink their own Stands to the same size and enter Joseph's brain to battle Lovers.
• Done in an episode of Kirby: Right Back at Ya! where Kirby goes into King Dedede to cure a cold.
• In the Kyouran Kazoku Nikki episode "The Correct Way to Nurse", Kyouka turns the family, sans Yuuka, into a microscopic virus-fighting squad and takes them inside Ouka's body to remove an artifact that they tried to use to cure his cold.
• Discussed (but ultimately averted) in Miss Kobayashi's Dragon Maid. Takiya suggests that Tohru could do this to cure Kobayashi's fever in chapter 42. Tohru shoots down the idea, saying that Kobayashi's body wouldn't be able to handle it.
• The Osomatsu-san episode "We Caught A Cold" has each brother trade off taking care of the other five when they're all sick; when Jyushimatsu is the well one, he divides into a million microscopic clones of himself, which all invade the bodies of his brothers to fight the infections inside them. It works, but as a side effect, they all end up acting like Jyushimatsu themselves.
• Panty & Stocking with Garterbelt: Panty and Stocking, after being slipped shrinking drugs by the Daemon sisters and getting fed up with Brief's weird tea parties in "Inner Brief", jump down his throat and stab and shoot him from inside for their amusement.
• In the Parappa The Rapper episode "Did You Say You Didn't Sleep?!", Parappa's friend PJ gets infected by a virus, which causes him to grow into a giant every time he eats. This causes Parappa and his friends to get absorbed into his body and get rid of the virus in order to turn him back to normal.
• Rooster Fighter: Piyoko volunteers to get inside Morio to remove a parasite from his brain.
• The Joseph Lai mockbuster pseudoanime Space Transformers is about a mecha and its young pilots entering the body of a woman... who has a small galaxy inside her body.
• Time Bokan series Yattodetman does this in episode 37 where heroes and villains fight in the brain of a support character.
• Sgt. Frog:
  • In episode 10 anime, Keroro's mouth becomes infested with microscopic, cavity-causing aliens, and a good chunk of the rest of the cast (including a robot duplicate of the sergeant mentally controlled by Keroro) shrinks down and enters his mouth to fight them off. Turns out there's a devil-winged chick inside there. In the end, it happens to Natsumi.
  • A later episode has Giroro going inside Natsumi to fight an alien fungus.
• Wonder Beat Scramble is a whole series about this. Aliens seek the Secret of All Life by invading human bodies, and the heroes battle them using the titular ship Wonder Beat.

Comic Books

• The DCU:
  • There's a comic in which The Atom (Ray Palmer) has to enter the body of a patient to fight an infection. (Given his powers, it would be somewhat surprising to learn that this is the only time that happened.) Then Superman has to get himself shrunk and go in after him when the observers on the outside figure out that the microscopic creatures he's trying to get rid of are actually themselves fighting the infection rather than causing it.
  • There's a similar story in a Justice League of America comic in which the whole JL get shrunk by the Atom and enter someone's body. When shrinking themselves down, they also lose their powers, as they have to accelerate their perception of time, which throws their physiologies out of whack, resulting in them being briefly imprisoned by the microscopic life-forms.
  • Shortly after this, the Atom shrinks down Steel, Superboy and Supergirl to enter Superman's body to help treat a kryptonite 'tumour' he's recently developed (the Atom is unable to go himself, as he can't cope with the conditions inside Superman at this time, and Steel is briefly replaced by the Prankster, of all people).
  • In The Unknown Supergirl, Kara, who has been affected by a Red Kryptonite meteor, is shrunk to microscopic size, which she uses to her advantage to take care of some infectious viruses that are inside Dick Malverne's adoptive father.
  • In The Great Darkness Saga, Yera-as-Shrinking Violet kills a Servant of Darkness by shrinking down, entering her body, and expanding inside her blood vessels to give her a stroke.
  • The 18th issue of Justice League Adventures, the first of two comic book tie-ins for the DC Animated Universe Justice League cartoon, has the Atom shrinking the JLA to enter Superman's body and defend it against microscopic aliens who want to control him in order to destroy the mysterious "Evano" who killed their scouts years earlier (actually Evan O., the owner of a comic book store who a kid found their spaceship, thought it was a toy, and put it in water).
• In this Disney Ducks Comic Universe story, Gyro shrinks Donald Duck (and a submarine) so he can go inside Uncle Scrooge and save his life.
• The tenth and final issue of Madballs has the Madballs Touchdown Terror, Bash Brain, and Fist Face enter the body of their arch-enemy Dr. Frankenbeans so that they could cure him of a virus.
• Marvel Universe:
  • Ant-Man of The Avengers gets to do this when he has to get inside his teammate The Vision in order to fix a malfunction inside him, during Avengers: The Kree/Skrull War. It's done again, as a Mythology Gag, in Heroes Reborn.
    • The second Ant-Man (Scott Lang) does a variation of this when he has to shrink down and enter Iron Man's armor to repair it after Tony is trapped inside the suit due to damage sustained in a battle with the Hulk.
    • Scott does this more literally when he's part of a team helping to cure Bruce Banner's ALS, as he shrinks down and enters the Hulk's body so that he can literally alter Banner's DNA to cure him of the disease.
    • Pym does it again in New Avengers to retrieve a device on Luke Cage's heart, bringing Doctor Strange with him.
  • In a later issue of Rom: Spaceknight, Rom and Starshine reduce themselves by the use of Ant-Man's technology to submicroscopic size so they can enter the body of an ant and find a way to defeat a semi-mystical plague.
  • An issue of Wolverine and the X-Men (Marvel Comics) has members of the X-Men shrink down and enter the body of Kitty Pryde to eliminate a Brood egg that has entered her system. Please note that this is immediately after Hank just finishes teaching a biology class on mutant genetics that takes place in Toad's body with the same process.
• In The Simpsons, Mr. Burns has become ill from suppressing his need to burp for decades. To undo the blockage that built up in his system, Burns' scientists plan to drop a shrunken submersible into his body. Though the pod can be remote controlled, they still need a pilot in case of an emergency. Since even 'an anthropod will do' Homer is selected.
• In Sonic the Hedgehog (Archie Comics) #33, Sonic must shrink down and enter Rotor's body to fight off robotic germs.
• Suske en Wiske: In "De Slimme Slapjanus", Suske, Wiske, and Lambik enter Jerome's body this way to find out what is causing him to be so weak all of a sudden, and hopefully destroy it before it does more harm. Sadly, the mission fails so they have to find another way.
• Teenage Mutant Ninja Turtles:
  • Volume 4 of Teenage Mutant Ninja Turtles (Mirage) features a variation similar to Futurama's: instead of shrinking down, the turtles send millions of mentally-willed NanoTurtleBots into April O'Neil's body, which has been infected by millions of NanoBaxterBots. A straight example appears later, with the turtles going into April's sister's body to fight off "alien cancer".
  • The Teenage Mutant Ninja Turtles: Saturday Morning Adventures story "Big Trouble in Master Splinter" has an example similar to the original comic above, with the turtles going into Splinter's body, since he is the one infected with NanoMousers.
• In Tom Strong, Tom and his gorilla sidekick Solomon have to shrink themselves to enter the body of the malfunctioning robot butler Pneuman (which is more complex than it sounds because Pneuman had originally been a Steampunk robot in the 1890s and had been upgraded continuously right into the 21st century, so his innards contained everything from gears to vacuum tubes to atomic reactors to nanites).
• The Annual issue of The Transformers: More than Meets the Eye opens with a group of Autobots led by Rodimus entering Ultra Magnus to destroy a colony of lethal Nanocons.

Fan Works

• As seen here [1] Adventures of the Silver Bullets features such a plot when Percy Jackson gets infected with nanobots.
• The Pokémon Squad: In one episode, Ash swallows Sailor Pikachu's Invader Zim DVD thinking it's a flat donut. Sailor Pikachu demands Max gets it out of him, so Max shrinks Brock and RM to go get it. And guess what the episode is called? RM and Brock: Ash's Inside Story.
• Kris Performs Surgery's main plot revolves around Susie and Kris entering Rudy's body to fight a tumor. Unlike most examples, though, they do not shrink down and physically enter him to do this, instead having Kris open a Dark World in his chest and going about it in there.
• Vow of Nudity: In one chapter, Kay'la is magically shrunken down to microscopic size and sent into the king's body to try and save him from his mysterious coma.

Films — Animation

• Osmosis Jones is this trope from Drix's perspective, as he's a cold medication that enters Frank's body to help the man. From the viewpoint of Thrax, the Big Bad virus, it's an inversion: he invades Frank's body to kill him. Averted by Osmosis Jones himself, a white blood cell who was already a resident of Frank.

Films — Live-Action

• Fantastic Voyage, obviously. The scientist who perfected the technology in the USSR is wounded after defecting and has a bloodclot that can't be operated on externally, so a team goes in on mini-submarine. They only have an hour to complete their mission because the only man who knows how to solve the time-limit problem is the comatose patient.
• Gamera vs. Jiger: The giant turtle is pierced by the ovipositor of his opponent of this film, implanting a larva into him and putting him into a coma. Two kids pilot a mini-sub into Gamera's body to get rid of the larva, successfully killing it by throwing their walkie-talkie at it (because, coincidentally, it's deathly weak to low-frequency sound waves).
• Godzilla, Mothra, King Ghidorah: Giant Monsters All-Out Attack!: Towards the end of the film, Godzilla has killed all three of the Guardian Monsters, and the future looks bleak for Japan. The Humans decide to launch a submarine to attack Godzilla with a missile which can drill through things, but Godzilla eats the submarine. The Captain has a Heroic Blue Screen of Death, but gets encouraged by the spirit of his daughter to adapt his plan. He fires the missile at Godzilla's throat from the inside, and escapes through the massive wound. Godzilla tries to fire his Atomic Breath, but it escapes through his throat instead, making the beast explode.
  • Additionally, there were several different proposals for a full-on Fantastic Voyage-style film involving shrunken humans traversing Godzilla's innards. While none made it to production, concept art◊ of at least one iteration exists.
• The movie Innerspace, but it's less, "let's enter the body to fix a problem," and more "let's find the tool that can allow me to exit before I run out of air."
• According to the trailer for the Australian documentary/film, That Sugar Film, presenter Damon Gameau shrinks down voluntarily, to go inside of actor Brenton Thwaites's body and examine the effects that sugar has on the heart and liver. Also, in a metaphysical fashion, when a shrunken version of Gameau goes inside the head of a larger version of himself, to examine the effects that sugar has on the brain.

Literature

• In The 13 ½ Lives of Captain Bluebear the main character that gives the book its name must venture through a giant's brain in order to get to the other side of a mountain chain, as the giant has died fallen asleep and its head is blocking the pass through the mountains.
• In A Wind in the Door, Meg Murry and several other characters shrink to microscopic size to enter Charles Wallace's mitochondria and save him from the rebellious farandolae destroying him from the inside.
• In the fifth novel in the Young Wizards series, Wizard's Dilemma, Nita and Kit travel into the body of Nita's mother, though they do so in a metaphysical manner rather than by shrinking themselves, with her body's metaphysical representation taking on the appearance of New York City.
• Animorphs: In "The Journey", several members of the team chase some really tiny aliens inside Marco's body with the help of a convenient shrink ray. Unfortunately, the aliens anticipated this and sabotaged the shrink ray, so the team became much smaller than they were intending. This is made more complicated by the fact that Marco can shapeshift, and everyone is nearly crushed to death when he turns into a cockroach.
• Show Within a Show version: in Dream Park, one of the park's many popular attractions is the Mr. Digestion roller coaster.
• Besides the film novelization that he wrote (which is in itself notable for being a movie tie-in that's still in print over forty years after the movie was in theaters), Isaac Asimov wrote a Spiritual Sequel novel in the 1980s called Fantastic Voyage II: Destination Brain.
• In Journey to the West (and by extension most adaptations thereof), Sun Wukong shrinks himself and enters Princess Iron Fan's body by hiding in her soup.
• In the first The Paper Magician book, Ceony winds up shrunk down and traveling through Thane's disembodied heart. As she travels, she phases back and forth between his physical heart and his metaphorical heart (desires, fears, etc.), making this an unusual hybrid with Journey to the Center of the Mind.
• The story "The Space Cow" inverts this; a normal-sized veterinarian enters a gigantic alien organism to attempt to diagnose its apparent illness. The animal is perfectly healthy; it's just lethargic because its young are ready to leave its stomach and begin independent living.
• Lenny Cyrus School Virus has Lenny shrink himself down and enter his crush's body in an attempt to change her mind about not liking him, only to have to save her from a life-threatening disease.
• The Franny K. Stein book Frantastic Voyage had Franny have to enter her dog Igor's body to save his life after he ate a doomsday device she built.
• Pale introduces a variation in the form of the Alcazar Ritual; while the ritual can be done on people (Other or human) to produce the standard version, it can also be used on objects. And while it has its dangers - its initial mention comes with an example of a botched version trapping the celebrant in a loop that reset with her murder, for example - it has come in useful to the protagonists twice now. Once, going into a photo, and the second time going into the furs of the Carmine Beast.
• Harlan Ellison's short story "Adrift off the Islets of Langerhans" has the werewolf protagonist's microminiaturized clone go into his body in search of his soul.

Live-Action TV

• In an early part-animated, part-live action Afterschool Special, "The Incredible Indelible Magical Physical Mystery Trip", a magical being named Timer (who would later appear on ABC's Saturday Morning cartoon block in a series of PSA spots) shrinks two children and takes them on a tour of their uncle's body to better understand the importance of health and physical fitness. A sequel, "The Magical Mystery Trip Through Little Red's Head", has Timer take two different kids on a tour of their teenage sister's brain to explain how the human mind works, 41 years before Inside Out.
• In the cartoon segments of The Aquabats! Super Show!, the band shrinks down to infiltrate Jimmy the Robot's body in order to rid him of his parasites that make him malfunction. Humorously, it is never explained how they shrunk themselves down, it just happens.
• In Choujin Sentai Jetman episode 43, the Jetman (minus Kaori) shrink Jet Icarus to go into the Commander's body to save her from a Bio Dimension Beast.
• Joked with in the opening scene of the Community episode "Conventions of Space and Time", when Troy explains to Britta that them dating might cause Abed to relapse into another meltdown, and have to resort to this trope to bring him back. Abed already knew, but didn't say anything because he liked the donuts that Britta brought to their apartment.
• In Cosmos: A Spacetime Odyssey, Neil shrinks the Ship of the Imagination down to cellular level to fly into a brown bear's bloodstream, eventually traveling to the ovaries where he can explain how genetic mutations gave rise to polar bears.
• The German-Polish six-episode series Die Insider: Micro Podroz takes two scientists in a miniaturized spaceship and has them explore the human body. They bounce off a nose hair and into a nose; collide with an eyeball and then shrink even smaller to explore vision, and are almost consumed by a macrophage.
• Doctor Who:
  • In serial "The Invisible Enemy", miniaturized clones of the Doctor and Leela enter the Doctor's body to fight a virus. They fail, but clone-Leela's dissolving corpse imbues the Doctor with immunity to the aforementioned virus.
  • In the episode "Into the Dalek", the Doctor, along with Clara Oswald and some human soldiers enter the outer-shell of a malfunctioning Dalek called Rusty.
• Farscape has an episode featuring a Budong, an animal so big that an entire colony of people could live in its corpse collecting the minerals produced in the stomach, with the obvious problems of gastric juices and other treats still in common.
• Spoofed in an episode of Fur TV when Lapeño, Mervin and Fat Ed's Identical Cousin enter Ed's anus after he overgrows due to infected food.
• Another live-action example is an episode of Homeboys in Outer Space.
• The premier episode of Honey, I Shrunk the Kids did this accidentally when the family and their fully submersible (just in case) minivan wound up inside Grandpa. They did some impromptu cholesterol removal with the laser windshield de-icer, prompting the mother to ask "Why aren't we richer?"
• Hounded : In episode 8 (Queen Mu), Dr Mu has shrunk himself down to the size of a single bacteria, transported himself into her brain and is now controlling her! Rufus, who has sneaked on board Mu Force One and overheard the doctor's scheme, decides to go after him. Inside the Queen's stomach he teams up with a pair of Royal brain-cells who have been evicted from the Royal brain by Dr Mu. Together they set off on an incredible journey around the Queen's body. But when the Queen's yappy little dog arrives in the Palace, things don't go quite according to plan...
• Journey to the West (1996) have this happening in both seasons:
  • The first season sees Sun Wukong shrinking himself and hiding in soup to infiltrate the stomach of Princess Iron Fan, in order to co-erce her into surrendering her fan by threatening to beat up her insides. It doesn't work when Iron Fan managed to expel Wukong on her own.
  • The second season has both Sun Wukong and Bajie turning microscopic-sized to help a king who's long-suffering from constipation, and they find out the king was cursed into having a ball of glutinous rice stuck in his intestinal canal by a vengeful demon, blocking most of his digestive system.
• Kroll Show has a particularly jarring version of this when Bobby Bottleservice, Peter Paparazzo, and Gian shrink down and enter Bobby's own body, in order to rid himself of his love for Farley.
• In a season one episode of Legends of Tomorrow, Ray uses his shrinking Atom suit to enter Kendra's bloodstream and remove fragments of a dagger.
• In one of the more clever Lost in Space episodes, Will Robinson and Dr. Smith find a severely malfunctioning robot who has become a giant due to his problem. The two have to physically enter the robot's body to fix him. However, the major complication is that they know that the second they are successful, the robot's body would start shrinking to normal size and they would have only seconds to escape before they are crushed. Naturally, the pair escape just in time before it was too late.
• The Middleman: The episode "The Clotharian Contamination Protocol" had Wendy go inside Ida's body to stop nanobots from making her explode. The snarky subtitles referred to it as "Like Fantastic Voyage. Or Die Hard in an Android".
• The Mighty Boosh: In the episode "Journey to the Centre of the Punk", punk Vince is infected with a Jazz Virus, and Howard and Lester are shrunk in order to destroy it. This is probably the strangest one ever, especially the antibodies singing a song with Howard while he's trying to convince them he's their friend.
• Mighty Med has an episode in which an envious Kaz uses a shrinking ray on Oliver as revenge for "stealing" his crush. It just so happens that a superhero with metallic skin has fallen ill and, as his skin makes x-rays and injections impossible, the only way to find out what's wrong is to send Oliver inside him. It turns out to be the superhero's arch-enemy, who had shrunken himself down to destroy the hero from the inside.
• In the Mr. Young episode "Mr. Heart", Adam and Derby shrink down and enter Echo's body without her knowledge to fight a flu virus and allow her to go on a date with Adam that same day. Of course, they do have to find a way out again. When they do get out and return to normal size, Echo accidentally shrinks Adam, Derby, and herself. The three of them are accidentally swallowed by Slab, who is seen entering the bathroom during the ending credits, remarking that his favourite stall is free.
• Sabrina the Teenage Witch:
  • In "No One Knows Libby Like Sabrina Knows Libby", Sabrina enters Libby's brain.
  • In a later episode, Sabrina went inside herself to make room in her heart for a new beau.
• When Kirk Douglas hosted an episode of Saturday Night Live, he played a "microdentist" in a sketch that spoofed the movie Fantastic Voyage listed above under live action films.
• The Star Trek: Deep Space Nine episode "One Little Ship" plays with this by having a space anomaly shrink down a runabout. While Dax, O'Brien and Bashir aren't inside a human body, they're on board the Defiant during an attack by the Dominion, and many of the same issues apply. One key component of the shrinking plot is that the ship has been shrunken at the molecular level — this means that the air outside the ship would've been fatal to them if they had tried to breathe it due to the size of the molecules.
• Ultra Series:
  • In an episode of Ultraseven entitled "The Flower Where Evil Lies", an alien insect called Darii gets into the body of a young woman related to one of the Ultra Garrison's members. Ultraseven miniaturises himself, and enters the girl's body so he can fight the insect and save her life.
  • Ultraman 80 has two episodes in which 80 did this. The first is "The Visitor from Space", in which an old friend of 80 named Alma comes to Earth to study negative energy with her snail-like Jakki. However, Jakki absorbs too much negative energy and goes rogue until it is accidentally consumed by a zoo elephant, transforming the elephant into the giant monster Zuruzlar and forcing 80 to shrink himself and go inside Zuruzlar to subdue Jakki. The second is "I'm a Monster, You Guys!", in which a boy named Tetsuo eats an alien seed on a dare and is turned into a child-sized monster by it (though he still acts and thinks like a kid). The climax sees 80 shrink down and go inside Tetsuo to defeat the space plant.
• An episode of Weird Science has Chett eating a map to a house party that Wyatt and Gary were invited to. Wyatt and Gary shrink down, along with Lisa, to go inside Chett to retrieve the map.
• In an episode of Wizards of Waverly Place, aptly titled "Journey to the Center of Mason", a jealous Mason attempts to eat Dean, Alex's ex-boyfriend, after the two of them start getting close again...and succeeds after Max uses magic to shrink Dean. Alex, Max and Justin then have to go inside of Mason to rescue Dean.

Music

• The song Samut and the Dragon (found in Peter Alsop and Bill Harley In the Hospital) details a young boy with cancer who uses imagery to help his body heal. Every evening he dresses up like a knight and rides a white stallion into his own body, "by the bloody steaming rivers... through the mighty sinew forest, under tendon trees and bone," until finally he finds the cancer, a dragon, and uses his "healing sword" to strike it down, leaving his body to heal in peace. Of course, the dragon's always back by the next evening, but one hopes it's getting a little weaker.
• The music video for the song Special K by Placebo acts as a kind of homage to the film Fantastic Voyage. The music video takes place at an unspecified laboratory where the lead singer, Brian Molko, is shrunk and sent into the body of drummer Steve Hewitt, in order to locate and destroy a clot somewhere in his brain.

Radio

• The last episode of Season 2 of Mitch Benn's Crimes Against Music is called "Journey to the Centre of Rick Wakeman", and is about Mitch and his friends doing exactly that in an Affectionate Parody of Wakeman's "Journey to the Centre of the Earth" Concept Album, because it's the only way to stop war between England and Wales. Or something.
• In Series Three of Old Harry's Game, Satan and the Professor take a journey into Scumspawn's brain, discovering it to be a wide empty space, containing only tumbleweed and lumbering demon-thoughts. The title of this episode does somewhat reference the Trope Namer- 'The Reasonably Fantastic Journey'.
• An audio series from Radio Phonic Audio, The Space Adventures of Chet Cosmos, has one episode where Chet is infected with parasitic stomach slugs, and the rest of the crew must shrink down and enter his digestive tract to remove them.
• Not long after Fantastic Voyage came out, Stan Freberg did a radio commercial, "Fantastic Sound System" to promote an automaker's car stereo.

Theater

• A UK-based stage production titled Intronauts takes place in a dystopian future where miniaturized human workers are injected inside other people in order to carry out "essential maintenance." This production incorporates the use of puppetry and visual imagery alongside its live performance to help the audience feel immersed in the story. The story in particular focuses on a woman who is injected inside a man who has an itch somewhere in his lower abdomen.

Theme Parks

• Disney Theme Parks:
  • EPCOT used to have a simulator ride called "Body Wars" based on this plot until 2007, when they closed down the entire pavilion that used to host it. It followed the travels of Dr. Cynthia Lair (played by Elisabeth Shue) as she studies how white blood cells react to a splinter.
  • There was also a ride that combines the concept with Journey to the Center of the Mind in the same pavilion, called "Cranium Command."
  • Preceding both of them is the former Disneyland ride Adventure Thru Inner Space.
• At the Futuroscope, the Virus Attack dynamic movie brings you inside a patient's body in a mission to kill the nasty virus.

Video Games

• In the ZX Spectrum game Blood and Guts, a miniaturised character must collect bits of a submarine and reconstruct it in the brain in order to escape through the eye, all the while using a laser to fight infections, random white blood cells to clear growths, and collecting red blood cells for oxygen. Eventually Quicksilva decided to abandon all pretense and re-released the game as Fantastic Voyage.
• Bodyworks Voyager is an educational game from 1994 set 20 Minutes in the Future and involving a crack team of commando-doctors trained to pilot fighter ships that are shrunk and injected into a patient's body, where your task is to shoot germs. Considering that this came out years before Trauma Center, some of the bugs are just damn hard.
• For some unknowable reason (wanting to make good use of the textures?), Breath of Fire II is in love with this setting: over the course of the game, Ryu journeys inside a whale (to kill the monsters nesting inside of it and wake it up), a tree (to cure its senility), and an overweight queen (to exterminate the calorie demons inside her organs).
• There is a level in Devil May Cry 3: Dante's Awakening which takes place in Leviathan's body. Leviathan isn't big enough to hold all of that space, but his in-game profile says that his body serves as a gateway to the "jealousy hell" (in a nice Shout-Out to Leviathan's traditional role as the patron demon of envy).
• The Doom user mod DTS:T features a level like this with the player wandering inside a human body- although to keep the level playable, the anatomy was incredibly bizarre.
• In one of the missions in Elite Beat Agents, the EBA enter a track star's body in order to encourage his immune system (anthropomorphized as a nurse) in its battle against a rather nasty virus. In the original Japanese game, the Ouendan squad helps antibodies fight off what appears to be food poisoning in a musician.
• Final Fantasy:
  • Midgame in Final Fantasy II, you are swallowed by Leviathan and must fight your way out of him.
  • In Final Fantasy XIV, players have to exploit this trope during the fight against Cerberus in the World of Darkness. Anyone who stands in Cerberus' sticky drool will end up chomped and instantly killed; however, if they let the Gastric Juices hit them with the Mini debuff first, they'll be swallowed whole instead and get a chance to punch the daylights out of Cerberus' stomach lining, causing the beast to collapse and leaving him vulnerable.
  • In Final Fantasy Legend II, the party must travel inside Kai in order to fight off micronized soldiers of Ashura and extract the Magi from Kai. While this saves her life, it also means that she can't heal you afterwards since the Magi granted her healing powers.
• Gears of War 2 has Delta Squad swallowed whole by a giant riftworm that's been sinking human cities. Marcus and the gang have to kill it from the inside out using freaking chainsaws.
• The Gradius Gaiden Game Salamander was retooled in the arcade as Life Force, set inside a planet-devouring Eldritch Abomination named Zelos.
• The Hitchhiker's Guide to the Galaxy (1984) includes a sequence in which Arthur finds himself exploring his own brain.
• Kingdom Hearts has a Monstro Womb Level, which has more anatomical detail than the film it's based on.
• La-Mulana: The Ruins of La-Mulana are the Mother's body, and the true form of the final dungeon is a hybrid ruin/Womb Level.
• The Legend of Zelda:
  • The Legend of Zelda: Ocarina of Time features Inside Jabu-Jabu's Belly, which is a dungeon set inside the body of a giant fish, where you have to kill a parasite that is affecting his behaviour. On the flora side of things, the very first dungeon in the game has you do the same for a giant, sentient tree (Inside the Deku Tree).
  • The Legend of Zelda: Oracle Games reuses the two concepts from Ocarina of Time. For both the Maku Trees, within each of them lies the Hall of Secrets, where you can get special items and upgrades in a linked game, and for each essence you obtain, the trees begin to grow and it is after finding the final essence, you can access the very top of the trees. In addition, Jabu-Jabu's Belly serves as the seventh dungeon in Oracle of Ages, where you have to lower and raise the water level a few times until you reach and defeat Plasmarine to obtain the seventh Essence of Time, the Rolling Sea.
• In the 1983 Apple II game Microbe, a miniaturized submarine and crew are injected into a patient's leg vein. They must proceed through various organs and blood vessels to the brain, where they will fix the patient's problem. Certain organs provide specific benefits: the submarine can refuel in the liver and get more air in the lungs.
• The Interactive Movie Microcosm is a space shoot-'em-up with this plot.
• The Intellivision game Micro Surgeon has this as its plot.
• In the Moshi Monsters mission "20,000 Leauges Under the Fur", the monsters must shrink themselves and go into Elder Furi's body to remove Glumps that are in there.
• Done twice in Ōkami. First, a shrunken Amaterasu has to enter the Emperor's body, through his mouth, to stop whatever it is that is making him exhale a noxious gas. A much longer trip involves a full-sized Ammy leaping down the gullet of the Water Dragon and exploring its innards, causing such wounds in the process that the Dragon dies from internal bleeding.
• Project Remedium is an FPS set inside a human body, where you play as a nanobot shooting assorted diseases and illnesses.
• Ratchet & Clank: Size Matters has a level where Ratchet must travel inside Clank in order to reboot him after he is attacked by Technomites.
• Rex Ronan: Experimental Surgeon, an anti-smoking Edutainment Game for the SNES, has the title character shrinking himself to enter the body of a dying smoker to eradicate tobacco-induced ailments and Mecha-Mooks sent by the evil tobacco company.
• The last part of Space Quest VI: Roger Wilco in the Spinal Frontier involves series hero Roger Wilco being sent into the body of his friend/love interest Stellar, to save her from being killed/possessed by nanites. Although Roger has a shrunken shuttlecraft for part of the voyage, much of the action takes place on foot; many of the puzzles involve figuring out how to navigate through Stellar's labyrinthian innards. Among other things, he uses digestive juices to break open a medicine capsule, carries out an improvised balloon angioplasty (using alveoli) to clear a path through a blocked glandular duct, rides a tapeworm through the small intestine to avoid being digested, and jabs her brain with a paper clip to trigger a debris-dislodging cough.
• There's a fan-made mission in Star Trek Online that uses the same "subspace compression" technique that's in the Star Trek: Deep Space Nine episode above to shrink the party and enter someone's body.
• Super Mario Bros.:
  • Super Mario World 2: Yoshi's Island has a boss fight which features this trope: you're shrunk down to bite-size by Kamek and have to fight your way out of Prince Froggy's stomach.
  • Paper Mario 64: After clearing Chapter 4, the next stop for Mario and his team is Lavalava Island, and their means of transportation is a whale residing at the Toad Town Harbor. Unfortunately, that whale has a bellyache, so Mario and his party have to traverse the inside of that whale's body to defeat a caterpillar-like creature causing his illness.
  • The plot of Mario & Luigi: Bowser's Inside Story has the brothers working with Bowser after the latter ends up sucking them up inside of him.
• Tales of Graces involves being swallowed by an enormous creature called the Rockgagong and navigating the dungeon inside its innards to escape. You can later choose to fight the Rockgagong as a bonus boss, and it is so large it can't fit inside the battle arena.
• The Amiga game Vaxine has you fighting diseases within different organs of the body, only the playing field is an infinite chessboard and the diseases are represented by bouncing balls.
• The Wonderful 101 has a chapter where the team must travel inside the body of Prince Vorkken to prevent a nano-bioweapon called Vaaiki from killing him.
• Irem's shooter X Multiply is set inside a human body, where you pilot a microscopic fighter called an X-002 to battle an alien virus. You even get to see the X-002 coming out of the tip of a syringe at the very beginning of the game.

Web Animation

• AstroLOLogy: In "Shrinking Taurus", Taurus hides an engagement ring intended for Cancer in a slice of cake, only for Aries to eat the whole thing, so Taurus pilots a miniaturized submarine into Aries' body to get it back.
• Seppuku's episode in the World of the Damned storyline of Banana-nana-Ninja! has him shrinking down and swimming through his opponent's intestines and bloodstream.
• The Happy Tree Friends episode "I've Got You Under My Skin" has Sniffles shrinking down to cure Giggles' cold. Unsurprisingly for the series, it ends in far worse maladies than any illness, which kicks off when he accidentally gets injected into Lumpy instead.
• Wendell & Wuggums: The first episode has Wendell (then named Wallace) going inside his dog Wuggums' body after shrinking.

Webcomics

• Awful Hospital: "Endoshifts" let people enter worlds derived from bodies,^note both those of others, and even their own shaped by the concepts they encountered during their lives. In the Inert Sub-Concept Vessel arc, Fern inadvertently stumbles into a zone spawned from the corpse of one of her alternate selves. It's also used as a diagnostic tool.
• Done in The Non-Adventures of Wonderella here.
• Done in Work Sucks here. When your boss won't see a doctor, the only logical solution is to shrink down and let him swallow you to help remove parasite causing it.

Web Videos

• The Annoying Orange: The episode "Fruit-tastic Voyage" sees Orange and the other fruits traveling inside Nerville in order to remove a laser that had been implanted in his brain by broccoli aliens.
• Spanish channel Changovisión created this Ant-Man inspired comedy video. Channel creator Mike shrinks down and enters the bloodstream of his friend, Johan, in order to rid his body of coronavirus.
• Parodied in the Smosh sketch "Adult Magic School Bus", in which Ms. Frizzle (played by Ian) forces the rest of the class on a trip inside of her ex-husband's body to "find out what the inside of a 55-year-old husband's cheating heart looks like" — and then deliberately grows her car back to normal size without leaving his body.
• In the SuperMarioLogan episode "Jeffy Gets Stung By a Bee!", Mario and Brooklyn T. Guy believe that Jeffy swallowed the rare Banana Butterfly, which, when digested, causes the victim's arms to fall off and the victim to turn into a banana, so they shrink themselves down to microscopic size and pilot a microscopic submarine to get the butterfly out of Jeffy's stomach. When it turns out that Jeffy swallowed a bee, they are angry at Jeffy for making them waste their time on him. Then it turns out that Jeffy really did swallow a banana butterfly along with the bee.
• Whale Lords had the characters go into the bowels of their Sky Whale to find the source of its illness. And the players discussed the trope without really realizing it:
  Lewis: This is like that film, where they got shrunk down.
  Duncan: "Magic School Bus"?
  Sips: "Honey, I Shrunk the Kids and Then a Whale Ate Them"?
  Sjin: "Ant-Man"?
  Simon: "Innerspace"?
  Lewis: Yes, that's the one!
  Duncan: That's happened on so many things.

Western Animation

• One of the many sketches from 2DTV sees Tony Blair in hospital suffering from an unknown heart condition. The NHS wants to send a shrunken team of scientists into his body to resolve the problem, but John Prescott steps on them, so John Prescott, David Blunkett (and his guide dog), Jack Straw and Tony's wife Cherie Blair are sent. It turns out that Gordon Brown is the one causing Tony's heart problems, in his latest attempt to become Prime Minister.
• In the Aaahh!!! Real Monsters episode "Internal Affairs", after Oblina accidentally ingests a parasite monster that forces her to eat constantly, Ickis and Krumm are shrunk down and sent in to remove it before Oblina explodes from overeating.
• In one episode of The Adventures of Jimmy Neutron, Boy Genius, Jimmy and Sheen go inside Carl's body in order to get DNA so that Jimmy can make a cure to an illness. Of course, there is then the trouble of how you get out... but they soon decide that they should make Carl sneeze them out.
• An episode of Alf Tales taking advantage of the Little Red Riding Hood story has Alf traveling inside the wolf's body.
• In the Aqua Teen Hunger Force episode "Unremarkable Voyage", after Meatwad swallows an experimental computer chip, Frylock shrinks himself to go in and get it. Thanks to a few screw-ups, both he and a miniaturized Carl eventually wind up inside Master Shake. They then have to beat their way out of Shake's eye, killing him in the process. No worries though.
• The Archer story "Drastic Voyage: Part I/Part II" has the group use the shrinking technology to remove a blood clot from the man who invented the Shrink Ray, in a direct Whole-Plot Reference to the film. Unfortunately, Krieger interferes with the procedure, causing them to be injected into the man's foot rather than his neck. It's about the first example when they fail, returning to their size while still in the man's head, killing him instantly.
• Arthur: Doesn't really happen, but in "Buster's Breathless", Buster Baxter tries to explain his asthma by telling his classmates to imagine themselves inside his lungs.
• The Batman: The Brave and the Bold episode "Journey to the Center of the Bat!", starring Aquaman, the Atom, and the cutest lymphocyte ever.
• Beetlejuice: In "Forget Me Nuts", BJ got a bad case of Easy Amnesia after being hit by a falling satellite, and a psychiatrist shrinks himself, Lydia, and a duplicate of Beetlejuice so they can enter the original BJ's body, work their way to the brain, and fix the problem.
• Bill & Ted's Excellent Adventures: Bill and Ted go inside their Gym teacher's body. They even befriend the pretty female Anthropomorphic Personifications of his lungs. Makes Sense In Context.
• Bubble Guppies: The outside segment of "Swimtastic Check-Up!" features Goby and Deema going inside Nonny to wipe out a stomach bug.
• In the Bump in the Night episode "Gum Crazy", Mr. Bumpy travels inside his own body with Squishington in an attempt to retrieve the chewing gum stored in his stomach.
• Camp Lakebottom: A miniaturized McGee ends up inside Buttsquat in "Buttastic Voyage".
• This forms the plot of the Captain N: The Game Master episode "Germ Wars": the rest of the N Team shrinks down to enter Captain N's body to help him fight off a disease.
• In Captain Planet and the Planeteers, the shrunken Planeteers battle microbes from polluted water inside Kwame after he accidentally drinks them.
• In an episode of CatDog, Cat goes inside his and Dog's own body after Cat eats Dog's pet fish. Very, very confusing if you haven't seen it.
• Multiple episodes of The Cat in the Hat Knows a Lot About That! have the Cat take Sally and Nick on a tour of someone's body in a shrunken Thingamajigger to learn about various body parts, such as the stomach, the heart, the nose, etc.
• The Chipmunks: In the episode "Inner Dave", the boys are accidentally shrunk by one of Simon's inventions. They end up going inside Dave's head in order to try telling him what happened.
• The titular character of Chowder once ate a really sour fruit that made his lips pucker so tight that he created a portal that sucks himself into his own mouth. He then had to get rid of the pieces of fruit in his mouth, led by "Lord Souron", with sweets and a musical number to get back.
• Codename: Kids Next Door has "Operation S.P.R.O.U.T.", in which Numbuh Four accidentally eats a Brussels sprout, and Numbuhs One, Two and Five have six minutes to shrink themselves and enter his body to retrieve it before he digests it. They succeed, but then Numbuh Four accidentally eats a piece of liver!
• There is an episode of Cow and Chicken titled "Journey to the Center of Cow" in which Chicken is accidentally swallowed by Cow, in a rare example wherein someone is not shrunk.
• This happens in the Curious George episode "Inside Story", in which the titular character doesn't feel well and has a dream where he and Gnocchi fight the germs that have invaded his body.
• Danger Mouse has an episode in which DM and Penfold use Baron Greenback's shrink ray to follow the villain inside Colonel K. to defeat the toad's terrible plot.
• Dex Hamilton: Alien Entomologist has an episode in which the crew have to travel into the body of sick Space Whale in order to cure it.
• Dexter's Laboratory:
  • In one of the earlier seasons of the show, a mini-segment has Dexter exploring Dee Dee's brain, only for Dee Dee to pull him out with a Q-tip.
  • The episode "Fantastic Boyage" has Dexter trying to get to Dee Dee's body to combat a cold she's having. He unknowingly ends up in the dog instead.
• Endangered Species (2015) has "Innards Space", in which Pickle is shrunk down and pilots a submarine into Gull's body to locate a TV remote he ate.
• The Fairly OddParents!:
  • In "Tiny Timmy!", Timmy shrinks down to microscopic size to do a biology report and ends up inside Vicky. This is treated in an almost joking manner, with Vicky's insides treated as a building with multiple workers
  • A straighter example occurs years later in Season 10, with the episode "One Flu Over the Crocker's Nest", involving Timmy and Chloe going inside Mr. Crocker to destroy a fairy virus after Cosmo sneezes on him.
• Family Guy:
  • In "Emission Impossible", Stewie shrinks himself and enters Peter's body to prevent his parents from reproducing. Apparently all sperm are their potential human counterparts flying around in fighter jets. Stewie also meets a comrade in sperm form who shares the same sadistic tendencies as Stewie. He actually gets born in a later episode after Peter donates sperm.
  • Parodied in "Our Idiot Brian", whereupon being informed that Brian has developed a benign brain tumor that's reducing his intelligence, Peter volunteers to shrink down to destroy it. He resizes almost immediately after and says he was raped by a bug.
• Futurama: In "Parasites Lost", the Planet Express team enter Fry's body to interact with the worms that started living there. In a twist, they don't shrink because, according to Professor Farnsworth, "That would require extremely tiny atoms" that he's not willing to pay for. Instead, the party uses miniature robot replicas of themselves. This gives Leela('s miniature) the opportunity to slice and dice them up without any long-term ramifications. It also allows for Fry to create his own tiny robot, thus effectively allowing him to go inside his own body.
• In one episode of Gawayn, Gwendolyn and Roderick have to travel inside the body of a dragon to kill the germ causing its acid reflux.
• The Godzilla: The Series episode "What a Long, Strange Trip It's Been" has Nick and Monique venture inside Godzilla Jr. For obvious reasons, shrinking isn't required.
• In one episode of Grojband, Kon ends up inside of Trina when he is accidentally zapped by Trina messing around with Kin's shrink ray and gets launched into her mouth in the process. The rest of Grojband has to get Kon out within one hour, because after that, he'll return to his normal size.
• In one episode of The High Fructose Adventures of Annoying Orange, Orange and the other fruits are shrunk down and sent inside Nerville on a miniaturized fruit cart to remove a laser that has been implanted in his brain by the broccoli aliens. It Makes Just as Much Sense in Context.
• The I Am Weasel episode "The Incredible Shrinking Weasel" has Weasel and Baboon shrink to repair a crack in the Red Guy's butt bone.
• In the Invader Zim episode "Nanozim", Zim miniaturizes himself and his spaceship to go invade Dib's brain after Dib manages to get proof of Zim's alienness. Dib then swallows a nanobot and has Gaz remotely control it, eventually leading to Dib's robot and Zim's robot fighting near Dib's brain.
• The Iron Man: The Animated Series episode "Iron Man, On the Inside" does this; Hawkeye's spine is injured in a fight, and Tony has a technological fix but no way to safely insert it. So naturally he goes for hand-delivery. This is further complicated when a similarly-shrunken Ultimo tags along (controlled by a computer hacker who has also hacked into HOMER and made him act bizarrely).
  [Tony is trapped in a ventricle]
  "You're giving Hawkeye a heart attack!"
  "Yeah, and it's me the heart's attacking!"
• A light example in Jackie Chan Adventures when Jackie and Hak Foo are shrunk to near microscopic sizes and end up inside Tohru's head who perceives their voices as voices in his head. Luckily, Tohru sneezes them out before they return to size inside his head.
• The Justice League Action episode "Inside Job" has Batman, Wonder Woman and the Atom shrink and travel inside Superman to save him from nanites Lex Luthor put in his body that are draining him of his strength.
• In the Lilo & Stitch: The Series episode "Poxy", the heroes must chase after an experiment of microscopic size that is inside Pleakley's body.
• Littlest Pet Shop (1995) has this when Delilah manages to eat Vim, causing Stu and others to go into Delilah to rescue her, where they go into several of Delilah's organs, although with lots of artistic interpretation.
• Several Looney Tunes shorts invert this by sending Bugs Bunny or another character running over and through the body of a giant as if it were a building (including pulling shades down over the giant's window-eyes). These no doubt influenced The Ren & Stimpy Show below.
• The Magic School Bus once takes a tour through the human body in one of the books that spawned the TV series, and then seven times in the TV series: Arnold is the "victim" in the book and the show's adaptation of it ("For Lunch"), with him accidentally ingesting the shrunken bus while eating a snack (which was later adapted into a computer game), while Ralphie and Ms. Frizzle have their turns as well, to investigate the body's immunity system ("Inside Ralphie") and muscular systems ("Works Out"), respectively. Then they wind up going inside Arnold again to figure out what has made his skin turn orange ("Goes Cellular"). Later on, Arnold's cousin Janet gets her turn when the class goes inside her nose to study smell ("Makes a Stink"). In "Gets Eaten", they go inside a tuna fish, and in "Cracks a Yolk", they go inside a chicken (and get laid).
• The Mega Babies episode "Inner Ear Inferno" involves Meg and Buck being shrunk and travailing inside Derrick in order to find the cause of his ear infection.
• In the Mickey Mouse (2013) episode "Down the Hatch", Mickey Mouse and Goofy are accidentally miniaturized by a Shrink Ray and then are inadvertently swallowed by Donald Duck. They explore his body, but when he learns that they are in there, the duck tries all he can to get them out. In the end, as the shrinking effects wear off, Mickey and Goofy emerge from Donald by way of a giant egg, laid by Donald, a male duck!
• Mighty Mouse: The New Adventures uses this in the episode "Mundane Voyage", in which Mighty Mouse and Pearl Pureheart are miniaturized and sent into the President's body to save his life.
• Done in the Mona the Vampire episode "The Sam n' Ella Infiltration" to enter the body of someone who is sick.
• An episode of Muppet Babies (1984) has Kermit, Piggy, Gonzo and Skeeter use their imaginations to shrink down to germ-size and give Scooter's bumbling immune system a hand when he catches a cold.
• In the Muppet Babies (2018) episode "Don't Over Duet", the babies use Bunsen and Beaker's miniature submarine to travel inside Piggy's body and find her missing voice box in time for a duet that she's going to sing with Rowlf. Piggy has to learn the importance of taking a break while the other babies search her body, as talking, moving around, and making loud noises all compromise the mission.
• In the Nate Is Late episode "The Spore", Nate and Malika enter their gardener friend Violet's body to destroy the spore inside her stomach.
• In the Ned's Newt episode "Fantastic Neddage", Ned catches a cold and Ned and Newton travel inside his body to find a cure for it.
• The New Adventures Of Huckleberry Finn has an episode, "The Mission of Captain Mordecai", in which the three main characters, Huck Finn, Tom Sawyer and Becky Thatcher, get swallowed by a giant whale while trying to escape a mad Ahab-like sea captain who's trying to force them to be his new crew in his mission to kill said whale. To make matters worse, the giant whale also swallows the captain when he falls overboard while trying to harpoon it, and the rest of the episode deals with the young trio trying to evade the murderous captain while endeavoring to find a way out of the beast, which they finally do by climbing out its blowhole, the whale helping them along by blowing them out.
• In the Oggy and the Cockroaches episode "Globulopolis", while Dee Dee is swimming in a cup of yogurt, Oggy drinks it up, and Dee Dee along with it. Dee Dee then travels around the insides of Oggy and discovers white tiny ghost-clones, repeatedly punches Oggy's bladder as if it was a punching bag, and makes his stomach rumble by eating consumed fish inside it. In the end, when he gets out, he ends up in Oggy's nose and flies into Jack's mouth along with Joey and Marky.
• The Oh Yeah! Cartoons present nanorobotic parameciums known as the "Microcops" working to save a sick guy they live inside from an evil virus bug.
• In the Penn Zero: Part-Time Hero episode "Totally Into Your Body", Boone and Sasha are teleported into a sick Penn's body.
• In the Phineas and Ferb episode "Journey to the Center of Candace", when Isabella's dog Pinky eats her sash, the boys try to go inside and retrieve it, but accidentally get to Candice’s body instead.
• Pinky and the Brain do this in order to foil an intelligibly-enhanced cat's Dance Sensation plot from being carried out properly by a band, by shrinking themselves and letting themselves get ingested by one of the band members. Unfortunately for them, they get eaten by the completely wrong guy, but they made the best of the situation by having the guy stand in for them. Also done in the comic book, in which they attempt to enter the President's brain, but end up inside the First Dog.
• The Powerpuff Girls (2016): In the episode "Sugar, Spice and Super Lice", instead of going inside Buttercup's body, Blossom and Bubbles shrink down and go into her hair to wipe out some lice.
• Quack Pack has an episode in which a germ-loving scientist invades Donald's body, with Huey, Louie and Dewey being shrunk and sent inside their uncle in order to stop him.
• The Real Ghostbusters's episode "Mean Green Teen Machine" has Egon giving a conference inside a human vein (as part of a Dream Sequence).
• In the ReBoot episode "The Great Brain Robbery", Megabyte miniaturizes a mercenary named Mouse and his flunkies Hack and Slash and sends them to probe secrets from Bob's brain. Except they accidentally end up in Enzo's body instead, and Bob goes in after them.
• In the Regular Show episode "Cool Cubed", Thomas drinks a slushie which gives him extreme brain-freeze, and Mordecai and Rigby are sent into his body to thaw his brain out. His brain looks like a frozen wasteland.
• Inverted in a later episode of The Ren & Stimpy Show titled "Blazing Entrails"; a boy genius inflates Stimpy's body with a bicycle pump to ridiculous proportions, so that Ren can enter his body and find out why Stimpy is acting even stupider than usual.
• In the Rex the Runt episode "Holiday in Vince", the dogs voyage into Vince's brain in a shrunken submarine in an attempt to cure his Random Pavarotti Disease (he frequently blurts out short bursts of opera). Eventually they find his tuning knob and retune him to Radio 4 (so he now blurts out gardening tips and the shipping forecast instead).
• The Rick and Morty episode "Anatomy Park" is about Rick sending Morty into a homeless man's body. Bonus points for being a simultaneous send-up of Jurassic Park, with the episode's plot revolving around the eponymous microscopic amusement-park inside of the hobo and the subsequent escape of the viruses held within. Bonus Squick is added by the hobo dying very early into the adventure, leading to a Fantastic Voyage inside the man's decomposing corpse.
• Rugrats:
  • In the 1991 series episode "The Inside Story", Tommy and co. go inside Chuckie to retrieve a watermelon seed, though Angelica tags along with the intent to make the seed grow and Chuckie's stomach explode. In keeping with the relatively mundane setting, it's All Just a Dream (and once Chuckie wakes up from it, he expels the seed with a burp anyway).
  • In the 2021 series episode "Fish Stick", the babies imagine themselves travelling into Chas' body to extract The Fishy Song from it.
• In a tongue-in-cheek episode, Samurai Jack has to enter an ailing dragon's body to cure its devastating flatulence.
• In the Sealab 2021 episode "Craptastic Voyage", when Captain Shanks refuses to get treatment for a brain tumor because of his religion (a thinly disguised parody of Christian Science), Stormy, Quinn, and Debbie Dupree shrink themselves to microscopic size and travel through Shanks' body to deal with it themselves. Subverted in that the episode's mostly Star Wars parodies, not Fantastic Voyage. They don't make it out in time (thanks to the closest passage out of Shanks-his nose- being blocked off by Shanks sticking a hookah pipe up his nose) and end up deforming Shanks.
• In the second season finale of The Secret Saturdays, the first final battle between Zak and Argost takes place inside the body of the super cryptid fake Kur.
• The Simpsons:
  • In "So It's Come to This: A Simpsons Clip Show", Professor Frink references Fantastic Voyage by name as he discusses his plan to save Homer's life by miniaturizing three scientists ("one a beautiful woman") and sending them into his body. He doesn't actually follow through with it, noting that he's had a hard time finding volunteers.
  • "In the Belly of the Boss", the final segment of "Treehouse of Horror XV", has the Simpsons travel into Mr. Burns' body after the latter swallows Maggie after she mistakes a giant pill he ate for a ball pit and is shrunk. Marge references Latex Space Suit when she asks why her suit is so flatteringly cut. Homer replies, "But Marge, that's what turns a Mediocre Voyage into a Fantastic Voyage!" (A reference to Raquel Welch in the movie.)
• The South Park episode "Stupid Spoiled Whore Video Playset" has a twisted parody of this trope in which a gerbil named Lemminwinks has to find his way out of Mr. Slave's ass. Then it happens again with Paris Hilton.
• SpongeBob SquarePants has a few:
  • In Plankton's first appearance in the series, "Plankton!", he takes control of SpongeBob's brain and makes him make and hand-deliver a Krabby Patty to him personally.
  • In "Squidtastic Voyage", SpongeBob and Patrick enter Squidward's body in order to remove a clarinet reed stuck in his throat. They also screw around with his brain. Unfortunately, after completing the task, Patrick accidentally makes them re-enlarge while still inside Squidward. While he doesn't burst, he does swell up big time from having a full-grown submarine inside of him.
  • In "The Inside Job", Plankton plans to use his new invention, a mind connector, to try to obtain the Krabby Patty formula from Mr. Krabs's brain, but instead of being launched into Mr. Krabs's head, he ends up inside SpongeBob, the second time he enters his body. Traversing SpongeBob's brain and heart, Plankton succeeds in getting the information he wants, but the mind connector soon reveals to have a very nasty side effect when it absorbs the contents of that person's body: it corrupts the wearer's personality and delivers a Painful Transformation to make said wearer look and sound like the person whose information they're absorbing. Long story short: when Plankton absorbed the contents of SpongeBob's body, his personality and appearance changed to look and sound like SpongeBob's. As Karen tries to bring Plankton back to the Chum Bucket, the mission soon fails when the mind connector hits Patrick, causing Plankton's body and personality to look and sound like the dimwitted seastar.
    Karen: [takes Plankton, now transformed into Patrick, back to the Chum Bucket] Well, where's the recipe?
    Plankton Star: The what?
    Karen: I knew you'd louse this up.
    Plankton Star: Louse what up?
  • In "Karen's Virus", Karen gets sick after she caught a computer virus from a visiting acquaintance, so Plankton asks SpongeBob to deal with it. As such, Plankton digitalized SpongeBob for him to do so. It turns out that the virus has been eating through Karen's internal circuits and threatened to delete her mainframe (while she does a delusional rampage through Bikini Bottom), until SpongeBob used a Krabby Patty to pacify and remove it.
• Superfriends: The 1978 episode "Journey Through Inner Space" has a plot similar to the above Iron Man episode. When Aquaman is turned into a prehistoric sea monster through radiation, a shrunken Superman and Wonder Woman inside the Supermobile are injected into Aquaman's monster body to change him back using another dose of radiation. Meanwhile, the other Superfriends try to stop the monster's rampage.
• Used in an episode of Teen Titans (2003) in which Beast Boy turns into a bacterium to fight a computer virus that has taken over Cyborg.
• Teen Titans Go!:
  • Cyborg gets sick again and Robin, who always wanted to do this trope, shrinks himself and the team with a shrink ray he bought just for this purpose and goes into Cyborg. Reality and much Squick ensues, however, when the show deconstructs this trope and Robin experiences how gross the human body really is and leaves without curing Cyborg, disappointed.
  • Cyborg himself gets swallowed by the dragon in "The Night Begins to Shine", and encounters a giant killer tapeworm while wandering around in its digestive tract before blasting his way out.
• The Tick: In "Tick vs. Dot and Neil's Wedding", the Tick and company drive a submarine through Dinosaur Neil, who has mutated into a giant dinosaur monster, again, and cure him from the inside. Due to Dinosaur Neil's size, there is no shrinking involved.
• In an episode of Tiny Toon Adventures, Buster, Babs, and Calamity shrink to enter Plucky's head and examine his brain to watch his fantasies.
• Totally Spies!: Sam, Alex, and Clover shrink down to the size of microbes to fight a trio of villains inside Jerry's brain.
• Transformers:
  • In the finale of Transformers Return Of Convoy, the Battlestars are swallowed by Star Giant and have to fight their way out from within.
  • The Transformers has the episode "Microbots", which features Bumblebee, Perceptor, and Brawn shrinking down to enter Megatron and remove a power-enhancing crystal.
  • Transformers: Rescue Bots also has an episode in which Kade accidentally ingests some microscopic cleaning bots (Scrubmites), prompting the Rescue Bots to be shrunk down and retrieve them from his body.
• Tuca & Bertie: The Season 3 finale "The Mole" has the titular mole being a doctor that specializes in exploiting his small size to enter patients and repair them from the inside. When he gets lost inside Tuca, Bertie shrinks down and enters Tuca's body to help him fix a growth from an impending rupture in her vagina. Interestingly, it plays out more like a Journey to the Center of the Mind plot considering that Tuca's vagina pretty much also functions as her Happy Place full of homages to her friendship with Bertie.
• In an episode of Ultimate Spider-Man (2012), Spider-Man and Ant Man must shrink down into Fury's body that has been infected with Doc Ock's nano-bots.
• Uncle Grandpa once shrinks himself and Pizza Steve to get inside a kid's brain and make him better at video games.
• The Venture Bros.: Invoked, discussed, and lampshaded in the episode "The Diving Bell vs. the Butter Glider". For some reason, Doctor Venture is paralyzed, and they can't use an MRI because there's too much metal in his body, so the logical solution from Billy Quizboy is to get a submarine, shrink it down, and go inside to find the problem. Which turns out to be a clot in Doc's bloodstream caused by a previous shrunken submarine piloted by previous clones of Hank and Dean, whose skeletons are still there. The implication is that Billy was quick to suggest this solution because of what a sci-fi geek he is. He name-drops Fantastic Voyage as a "classic" and defends the quality of Innerspace, though his assistant dismisses the premise an old cliché.
• Wacky Races (2017) has an episode in which Dick Dastardly shrinks the other racers to microscopic size in order to win a race that's supposed to take place in an equally tiny racetrack. He does win by default until it's discovered that the other racers have been accidentally swallowed by Dastardly after winding up in the food he was eating. As a result, the race actually ends in a tie.
• In Saban Entertainment's The Why Why Family, most of the episode segments with Micro and Scopo Why Why, baby Victor's uncles, involve going with Victor into his family's bodies via shrinking themselves. This is also justified because Micro and Scopo are experts on the human body and nutrition.
• Yin Yang Yo!: In the episode "Voyage to the Center of the Yo", Yuck shrinks himself down into Master Yo's body so that he can steal the Toilet Brush of Illumination when the latter retrieves it from the Safety Deposit Box Dimension; Yin and Yang have to shrink themselves down in the battle cruiser and enter Master Yo's body in order to stop Yuck.
• In Young Justice - Revival Series, after Karen 'Bumblebee' Beecher gives birth, she's informed by the doctor that her daughter has a hole in her heart. In order to keep her newborn daughter alive until the heart surgeon can arrive, Karen suits up and shrinks down to microscopic size to enter the baby's body and apply a patch to the hole. Once she finishes this, thinking back to her earlier discussion with her husband about the ethics of DNA manipulation to trigger the Meta-Gene, she then shrinks even further to the point that she can apply the formula she created to a strand of her daughter's DNA...
  Doctor: This is crazy! I take the baby out of the mom; I never put the mom into the baby!
• Zeke's Pad: In "A Little Sketchy", Zeke and Jay shrink themselves down with the Pad and find themselves smack in the middle of Rachel's brain. Now Zeke and Jay have complete control over Rachel's actions. They make Rachel look like an absolute fool by making her do animal noises, walk into the wall, and say inappropriate things.

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