History CallBack / LiveActionTV

* ''Series/StarTrekVoyager'':
** In "Macrocosm", Janeway says to an ill Neelix, "You've got a high fever, fluid in your lungs..." He responds, shortly, "Lung." This calls back to the episode "Phage", two seasons earlier, in which Neelix's lungs were removed and he received a transplant of a single lung from Kes.

* ''[[Series/StarTrekTheOriginalSeries Star Trek]]'' (not known for its continuity) has a moment in the "The Deadly Years" where [[TheKirk Kirk]] references the Corbomite Self-Destruct Device from "The Corbomite Maneuver" in order to bluff some Romulans. Some of the Bridge Crew actually smile when he makes the broadcast. There's another one in "The Trouble with Tribbles" when the Klingon commander makes a reference to the Organian peace treaty. In "Errand of Mercy", the Organians intervened to stop the Klingons and TheFederation from trying to kill each other - apparently, they're still watching.

** In "Relics", Data gets a bottle of alcohol for Scotty in 10-forward, and when Scotty asks what it is, he says, "It is..." (pause while evaluating) "...it is green." This is in reference to the [[Series/StarTrekTheOriginalSeries episode]] "By Any Other Name", where Scotty brings a bottle of booze to a Kelvin, and when the Kelvin asks what it is, Scotty drunkenly examines it, and proclaims, "It is...it is green."

[[quoteright:350:[[Series/{{Supernatural}} https://static.tvtropes.org/pmwiki/pub/images/supernatural_worktodo.png]]]]

!!Shows with their own pages

** In "Donkey's Bad Day", Donkey and Panda eat Golden Crunchdoodles, the cereal that they were trying to find in "The Golden Crunchdoodles". In addition, one scene features the Ungrowdenia seeds from "Growing the Ungrowdenia" and Donkey and Panda's flag from "Mountain Climb Time".

* ''{{Series/Probe}}'''s "[[Recap/ProbeMetamorphicAnthropoidicPrototypeOverYou Metamorphic Anthropoidic Prototype Over You]]": At the climax, Austin turns on "[[StandardSnippet Blue Danube]]", and reminds [[StalkerWithACrush Josephine]] that it is [[DanceOfRomance their song]]. He uses this as a distraction.

** "A Donkey Hodie Halloween" contains three references to "Spooky Shadow Swamp":
*** [[spoiler: The possum that stole Bob Dog's ball]] in the episode makes a cameo wearing a pumpkin costume.

* ''CallBack/GameOfThrones''

** In "Good Dog School", Penguin Referee says "Squibbit, squibbit!" to try and distract Bob Dog. This is a reference to "Squibbit", where another penguin saying this word distracted Donkey and Panda from band practice.

* ''Series/{{MASH}}'' does this often with one of the more serious characters complaining about all the things Hawkeye, Trapper, and B.J. had done to them. [[MoodWhiplash More seriously]], there are references to [[McLeaned Col. Blake]], Trapper, and Radar after they left the show.

* ''Series/DoctorWho'':
** [[Recap/DoctorWhoS27E8FathersDay "Father's Day"]]: While he's angry with Rose for saving her father and thus changing the past, the Doctor says that he's "picked another stupid ape", in reference to Adam Mitchell, who was kicked off the TARDIS in the [[Recap/DoctorWhoS27E7TheLongGame previous episode]] for attempting to use time travel to enrich himself.
** [[Recap/DoctorWhoS27E9TheEmptyChild "The Empty Child"]]/[[Recap/DoctorWhoS27E10TheDoctorDances "The Doctor Dances"]]:
*** It remains to be seen whether the Time Agents referenced by 51st century Captain Jack Harkness in the new series are a Call Back to the Time Agents mentioned by his contemporary Magnus Greel in the Fourth Doctor serial [[Recap/DoctorWhoS14E6TheTalonsOfWengChiang "The Talons of Weng-Chiang"]].
*** Although the above-mentioned Adam Mitchell is never directly referenced, the Doctor is not fond of Jack at first, asking Rose where she picked him up. And this is ''before'' he realizes Jack's full, if unwitting, involvement in the plot.
** [[Recap/DoctorWhoS27E12BadWolf "Bad Wolf"]]:
*** The Doctor mentions having gone to Raxacoricofallapatorius, following on from [[Recap/DoctorWhoS27E11BoomTown "Boom Town"]].
*** The answer to one of the questions on ''The Weakest Link'' is "The Face of Boe". Rose gets it right because she's [[Recap/DoctorWhoS27E2TheEndOfTheWorld met him before]].
** [[Recap/DoctorWhoS27E13ThePartingOfTheWays "The Parting of the Ways"]]: Like in [[Recap/DoctorWhoS12E4GenesisOfTheDaleks "Genesis of the Daleks"]], the Doctor has the power to destroy the Daleks, but goes through a moral dilemma, ultimately deciding ''not'' to go through with it.
** [[Recap/DoctorWho2005CSTheChristmasInvasion "The Christmas Invasion"]]:
*** After stumbling out of the TARDIS at the beginning, the Doctor passes out on the ground in a position identical to those taken by many classic series Doctors before and after their regenerations.
*** Harriet Jones, Prime Minister[[labelnote:*]]Yes, we know who she is[[/labelnote]] makes a point of learning the names of everyone she meets. Given that the [[Recap/DoctorWhoS27E4AliensOfLondon last]] [[Recap/DoctorWhoS27E5WorldWarThree time]] she appeared, she never learned the name of a government aide (Indra Ganesh) who was killed by Blon Slitheen, it's likely to make sure that she knows ''this'' time.
** [[Recap/DoctorWhoS28E3SchoolReunion "School Reunion"]] was one big CallBack to the Fourth Doctor's era. As well, there was a more short-term Call Back: The Doctor explains that he can't open the Krilitane device because it's got a "deadlock seal". The same thing prevented him from unlocking the door from the Big Brother house in [[Recap/DoctorWhoS27E12BadWolf "Bad Wolf"]].
*** Deadlock seals have been mentioned repeatedly since, to the point where it's stopped being a CallBack to earlier references and started being a standard part of the series.
** [[Recap/DoctorWhoS28E4TheGirlInTheFireplace "The Girl in the Fireplace"]] has an automaton going BrokenRecord until our heroes figure out the obvious, just like K9 in the very previous episode.
** [[Recap/DoctorWhoS28E5RiseOfTheCybermen "Rise of the Cybermen"]]: For the first half of the episode, the Doctor wants nothing more than to escape from the AlternateUniverse. The [[Recap/DoctorWhoS7E4Inferno last time]] he was in an alternate universe, it... didn't end well.
** [[Recap/DoctorWhoS28E8TheImpossiblePlanet "The Impossible Planet"]]/[[Recap/DoctorWhoS28E9TheSatanPit "The Satan Pit"]]: The Ood look like a cross between [[Recap/DoctorWhoS1E7TheSensorites the Sensorites]] and [[Recap/DoctorWhoS3E6TheArk the Monoids]]. [[Recap/DoctorWhoS30E3PlanetOfTheOod "Planet of the Ood"]] would later reveal they're even from the same solar system as the Sensorites.
** [[Recap/DoctorWhoS28E12ArmyOfGhosts "Army of Ghosts"]]:
*** The Cybermen hiding in Torchwood reveal themselves in a homage shot to the way the Mondasian Cybermen clawed out of their pods in [[Recap/DoctorWhoS5E1TheTombOfTheCybermen "The Tomb of the Cybermen"]].
*** The Doctor's warning about [[Recap/DoctorWho2005CSTheChristmasInvasion aliens needing to stay away because the humans are coming]] has come true, as Torchwood sees it as perfectly within their rights to shoot down any aliens that enter their airspace whether they're hostile or not.
** [[Recap/DoctorWhoS28E13Doomsday "Doomsday"]]: The Doctor tries to send Rose away for her own safety. She's not having it, proclaiming [[Recap/DoctorWhoS27E13ThePartingOfTheWays "He's not doing that to me again!"]]
** [[Recap/DoctorWhoS29E1SmithAndJones "Smith and Jones"]]: Martha's "welcome aboard" scene is almost identical to Peri's from [[Recap/DoctorWhoS21E5PlanetOfFire "Planet of Fire"]]. In both cases, the Doctor and companion fall on the console before the Doctor makes his welcome.
** [[Recap/DoctorWhoS29E4DaleksInManhattan "Daleks in Manhattan"]]/[[Recap/DoctorWhoS29E5EvolutionOfTheDaleks "Evolution of the Daleks"]] isn't the [[Recap/DoctorWhoS2E8TheChase first time]] we've seen Daleks in the Empire State Building.
** [[Recap/DoctorWhoS29E6TheLazarusExperiment "The Lazarus Experiment"]]:
*** The Doctor's description of the Lazarus monster as an "evolutionary reject" is notably similar to the way the Fourth Doctor described the life-eating Fendahl in [[Recap/DoctorWhoS15E3ImageOfTheFendahl "Image of the Fendahl"]], creating very dark implications for old-school fans about the way things might have developed if it hadn't been killed quickly.
*** There's a hilarious ShoutOut to the Third Doctor's {{technobabble}} of choice, where the Tenth Doctor complains that it took him longer than usual to "{{reverse the polarity}}".
** [[Recap/DoctorWhoS29E11Utopia "Utopia"]]:
*** The Doctor talks about how humans are [[Recap/DoctorWhoS12E2TheArkInSpace "indomitable"]].
*** The [[Recap/DoctorWhoS29E8HumanNature Chameleon]] [[Recap/DoctorWhoS29E9TheFamilyOfBlood Arch]] returns. It turns out the Doctor's not the only Time Lord to use one this series...
** [[Recap/DoctorWhoS29E12TheSoundOfDrums "The Sound of Drums"]]:
*** The Master did the four-beat drumbeat with his fingers [[Recap/DoctorWhoTVMTheTVMovie once before]], though it didn't mean anything until this episode.
*** Saxon was the Minister of Defence who ordered the [[Recap/DoctorWho2006CSTheRunawayBride destruction of the Racnoss]].
** [[Recap/DoctorWhoS30E2TheFiresOfPompeii "The Fires of Pompeii"]]:
*** The Doctor mentions that he had [[BlatantLies nothing to do with]] [[Recap/DoctorWhoS2E4TheRomans Rome burning]]. "...Okay, maybe a little bit."
*** The Doctor's mention of "Volcano Day" nods to a comment made by Jack Harkness in [[Recap/DoctorWhoS27E9TheEmptyChild "The Empty Child"]], where he suggested the destruction of Pompeii as a good event for time travellers running "self-cleaning" cons to use.
** [[Recap/DoctorWhoS30E3PlanetOfTheOod "Planet of the Ood"]]:
*** The Doctor is all gleeful to walk into a snowstorm of ''actual snow'', after [[Recap/DoctorWho2005CSTheChristmasInvasion several]] [[Recap/DoctorWho2006CSTheRunawayBride false]] [[Recap/DoctorWho2007CSVoyageOfTheDamned starts]].
*** The Oodsphere is in the same system as Sensphere, home of [[Recap/DoctorWhoS1E7TheSensorites the Sensorites]]. The Doctor even notes his visit to the Sensphere was "ages" ago.
*** The 42[-[[superscript:nd]]-] century is the time of the Second Great and Bountiful Human Empire, which, unlike the [[Recap/DoctorWhoS27E7TheLongGame Fourth]], actually exists. Presumably this would be the same "empire" Mr. Jefferson mentioned back in [[Recap/DoctorWhoS28E8TheImpossiblePlanet "The Impossible Planet"]].
*** Donna wonders whether humans spreading out so far is a good thing — does it make them explorers or a virus? The Doctor responds that sometimes he wonders; he had a similar conversation with Leela in [[Recap/DoctorWhoS15E2TheInvisibleEnemy "The Invisible Enemy"]].
*** The Friends of the Ood were mentioned by the crew of Sanctuary Base 6 back in [[Recap/DoctorWhoS28E8TheImpossiblePlanet "The Impossible Planet"]].
** [[Recap/DoctorWhoS30E5ThePoisonSky "The Poison Sky"]]: When the Doctor is given a gas mask, he puts it on and asks, "[[Recap/DoctorWhoS27E9TheEmptyChild Are you]] [[Recap/DoctorWhoS27E10TheDoctorDances my mummy?]]"
** [[Recap/DoctorWhoS30E8SilenceInTheLibrary "Silence in the Library"]]/[[Recap/DoctorWhoS30E9ForestOfTheDead "Forest of the Dead"]]: As confirmed by WordOfGod, the squareness gun River Song owns in this story is the same one used by Captain Jack Harkness in [[Recap/DoctorWhoS27E9TheEmptyChild "The Empty Child"]]/[[Recap/DoctorWhoS27E10TheDoctorDances "The Doctor Dances"]]. River took it in the Doctor's future after Jack left it in the TARDIS at the end of Series 1.
** [[Recap/DoctorWhoS30E11TurnLeft "Turn Left"]]:
*** Just like the Doctor [[Recap/DoctorWhoS30E4TheSontaranStratagem a few episodes before]], Rose dislikes being saluted while working with an alternate-timeline UNIT.
*** At the end, Rose's appearance and the upcoming danger is heralded by the words "Bad Wolf" appearing everywhere the Doctor looks. These were the ArcWords of Series 1, appearing everywhere they went, but not nearly as frequently.
** [[Recap/DoctorWhoS30E12TheStolenEarth "The Stolen Earth"]]:
*** A great many of the stolen planets: [[Recap/DoctorWhoS28E10LoveAndMonsters Clom, twin planet of Raxacoricofallapatorius and home of the Abzorbaloff]]; [[Recap/DoctorWhoS27E11BoomTown Woman Wept, visited by Rose and the Ninth Doctor]]; [[Recap/DoctorWhoS30E10Midnight the Lost Moon of Poosh, subject of Dee Dee Blasco's research paper]]; [[Recap/DoctorWhoS30E2TheFiresOfPompeii Pyrovilia, lost home of the Pyroviles]]; and [[Recap/DoctorWhoS30E1PartnersInCrime the previously-unnamed Adipose 3]], which Miss Foster didn't know was ''literally'' missing.
*** Remember how in [[Recap/DoctorWhoS12E4GenesisOfTheDaleks "Genesis of the Daleks"]], Kaled General Ravon's medical scanner didn't know what to make of Harry? [[spoiler:When Davros [[BodyHorror opens his shirt]], we see why.]]
** [[Recap/DoctorWhoS30E13JourneysEnd "Journey's End"]]:
*** During a small-scale test, the Reality Bomb annihilates humans with the same effect used when [[Recap/DoctorWhoS27E13ThePartingOfTheWays Bad Wolf annihilated the Daleks]].
*** Sarah Jane and Rose remember each other from [[Recap/DoctorWhoS28E3SchoolReunion "School Reunion"]].
** [[Recap/DoctorWhoS30E15PlanetOfTheDead "Planet of the Dead"]]:
*** Captain Erisa Magambo, the commander of the UNIT forces present, was last seen in the alternate universe of [[Recap/DoctorWhoS30E11TurnLeft "Turn Left"]].
*** The Doctor reminisces when Christina calls him "Spaceman":
---->"I had this friend, once. She called me 'Spaceman'."
*** Carmen's prophecy that the Doctor's song will be ending soon echoes the words of the Ood in [[Recap/DoctorWhoS30E3PlanetOfTheOod "Planet of the Ood"]].
** [[Recap/DoctorWhoS30E16TheWatersOfMars "The Waters of Mars"]]:
*** Fixed points in time return from [[Recap/DoctorWhoS30E2TheFiresOfPompeii "The Fires of Pompeii"]]. Just like back then, the Doctor uses the TARDIS to save a few people at the last minute, although here it ''isn't'' a good thing. He also rehashes the argument he had with Donna in the earlier episode, then talks about everything he does to make that happen, when trying to persuade Adelaide to let him leave.
*** The Doctor is wearing the spacesuit he got from [[Recap/DoctorWhoS28E8TheImpossiblePlanet Sanctuary]] [[Recap/DoctorWhoS28E9TheSatanPit Base 6]].
*** When the shuttle explodes, several of the Doctor's lines about the Time Lords and his status as the LastOfHisKind are echoed as he stares at the wreckage.
** [[Recap/DoctorWhoS30E17E18TheEndOfTime "The End of Time"]]:
*** The BigBad is [[spoiler:Rassilon, founder of Time Lord society, resurrected to serve as Lord President]].
*** The Master's [[Recap/DoctorWhoS29E12TheSoundOfDrums drumbeat]] is explained as a real signal sent by the aforementioned BigBad, in what turns out to be a StableTimeLoop.
*** In the denouement, the Doctor goes and visits every single companion he'd had in the new series up to that point, as well as supporting characters like Jackie Tyler and Luke Smith. Even [[Recap/DoctorWho2007CSVoyageOfTheDamned Alonso]] makes an appearance!
** [[Recap/DoctorWhoS31E3VictoryOfTheDaleks "Victory of the Daleks"]]:
*** The concept of Daleks pretending to be servants goes all the way back to the Second Doctor serial [[Recap/DoctorWhoS4E3ThePowerOfTheDaleks "The Power of the Daleks"]]. Back then, the Daleks said "[[AC:I am your ser-vant!]]", here they say "[[AC:I am your sol-dier!]]" That same serial also introduced the Progenitor, as one had crash-landed on Vulcan. This episode clarifies its intended purpose.
*** The Doctor declares that this encounter will be [[Recap/DoctorWhoS4E9TheEvilOfTheDaleks the "final end" for the Daleks]].
*** The Doctor asks Amy to tell UsefulNotes/WinstonChurchill about when the Daleks [[Recap/DoctorWhoS30E12TheStolenEarth "invaded]] [[Recap/DoctorWhoS30E13JourneysEnd [her] world"]], and is ''extremely'' disturbed when she has no idea what he's on about.
*** This is not the first time [[Recap/DoctorWhoS29E5EvolutionOfTheDaleks the Doctor has all but dared a Dalek]] to [[DeathSeeker kill him]].
** [[Recap/DoctorWhoS31E4TheTimeOfAngels "The Time of Angels"]]:
*** The crash of the ''Byzantium'' was one of the future events River alluded to in passing in [[Recap/DoctorWhoS30E8SilenceInTheLibrary "Silence in the Library"]].
*** River's message to the Doctor contains the letters "Theta Sigma" (ΘΣ), his old Academy nickname.
*** The Angels communicate by stealing the voices of their victims, just like the [[Recap/DoctorWhoS30E8SilenceInTheLibrary Vashta]] [[Recap/DoctorWhoS30E9ForestOfTheDead Nerada]].
** [[Recap/DoctorWhoS31E5FleshAndStone "Flesh and Stone"]]: Angel Bob says "The Doctor in the TARDIS" and River mentions the Pandorica, both previously done by [[Recap/DoctorWhoS31E1TheEleventhHour Prisoner Zero]]. As well, the Atraxi eye appears on a screen briefly.
** [[Recap/DoctorWhoS31E10VincentAndTheDoctor "Vincent and the Doctor"]]: Amy tells Vincent he should consider trimming his beard before he next kisses someone. Later, when Vincent is overwhelmed by Dr. Black's praise, he gives him a kiss on both cheeks. As he pulls away, Vincent mutters "Sorry about the beard."
** [[Recap/DoctorWhoS31E11TheLodger "The Lodger"]]: The Doctor greets Craig and several of his friends with air-kisses to both cheeks, having seen Vincent greet people that way in the previous episode and assuming it might be the way people greet each other in the early 21[-[[superscript:st]]-] century.
** [[Recap/DoctorWhoS31E12ThePandoricaOpens "The Pandorica Opens"]]: The titular painting with the coordinates for the Doctor is created by [[Recap/DoctorWhoS31E10VincentAndTheDoctor Vincent van Gogh]], and [[Recap/DoctorWhoS31E3VictoryOfTheDaleks Churchill, Bracewell]] and [[Recap/DoctorWhoS31E2TheBeastBelow Liz Ten]] help deliver it.
** [[Recap/DoctorWhoS32E4TheDoctorsWife "The Doctor's Wife"]]: The little boxes found by the Eleventh Doctor first made their appearance when the Second Doctor used one at the end of [[Recap/DoctorWhoS6E7TheWarGames "The War Games"]].
** [[Recap/DoctorWho50thASTheDayOfTheDoctor "The Day of the Doctor"]]: In the end, the reason the [[spoiler:War]] Doctor decides he must [[spoiler:end the Time War]] is, fundamentally, the very reason that the Fourth Doctor refused to push the button and destroy the Daleks at their [[Recap/DoctorWhoS12E4GenesisOfTheDaleks genesis]]: a great evil done which inspires great hope and justice. [[spoiler:Incidentally, Creator/RussellTDavies has described the events of that episode as the "opening salvo" of the Time War.]]
*** Also, what the [[spoiler:War]] Doctor planned to do was almost exactly the same as Davros did in the same episode, for the same reason (though Davros was probably lying): [[spoiler:to destroy both his own and the enemy's races for the sake of peace]].
** [[Recap/DoctorWhoS37E1TheWomanWhoFellToEarth "The Woman Who Fell to Earth"]]:
*** The Doctor [[Recap/DoctorWhoS30E17E18TheEndOfTime survives a fall from at least aircraft altitudes]] without a scratch.
*** The episode begins with the same general situation as [[Recap/DoctorWhoS31E1TheEleventhHour "The Eleventh Hour"]]: the freshly-regenerated Doctor, as a direct result of damage to the TARDIS caused by said regeneration, falling out of the sky and landing in an English municipality at night. Only, unlike Eleven, Thirteen doesn't have the TARDIS to cushion the fall.
*** Also like "The Eleventh Hour", the Doctor doesn't initially have either a sonic screwdriver or access to the TARDIS.
*** After jumping between two cranes, the Doctor hangs on for dear life in a fashion reminiscent of Four in [[Recap/DoctorWhoS18E7Logopolis "Logopolis"]]. Unlike him, though, she doesn't fall.
*** At the end, the Doctor builds a teleporter to take her to the location of the TARDIS by locking on to the ship's unique energy signature, created by its [[Recap/DoctorWho2006CSTheRunawayBride unique power source]].
** [[Recap/DoctorWhoS37E2TheGhostMonument "The Ghost Monument"]]:
*** The TARDIS became the titular Ghost Monument by being caught in a materialization loop, similar to what happened in [[Recap/DoctorWhoS31E11TheLodger "The Lodger"]].
*** The Doctor breaks out Three's favoured Venusian Aikido to subdue Epzo when he's holding Angstrom at gunpoint.
*** The Doctor persuading the TARDIS to open up as she's lost her key is similar to [[Recap/DoctorWhoS35E11HeavenSent Twelve claiming that all doors are slightly psychic and then using telepathy to open one]].
*** "You've redecorated." Only this time, the redecoration is approved of.
*** The TARDIS' new console biscuit dispenser may reference both Eleven's love of Jammy Dodgers, and [[Recap/DoctorWhoS36E1ThePilot Twelve's mention of a macaroon dispenser while giving Bill directions to the toilet]].
** [[Recap/DoctorWhoS37E3Rosa "Rosa"]]:
*** Krasko, the villain, is a former inmate of the [[Recap/DoctorWhoS31E5FleshAndStone Stormcage]] [[Recap/DoctorWhoS32E2DayOfTheMoon Containment]] [[Recap/DoctorWhoS32E7AGoodManGoesToWar Facility]].
*** The Doctor once again refers to a vortex manipulator as "[[Recap/DoctorWhoS29E11Utopia cheap and]] [[Recap/DoctorWhoS35E1TheMagiciansApprentice nasty]] time travel".
** [[Recap/DoctorWhoS37E4ArachnidsInTheUK "Arachnids in the UK"]]:
*** After meeting the Doctor, Najia Khan expresses concern for her daughter Yaz, asking her how she knows her and who she is, echoing [[Recap/DoctorWhoS27E4AliensOfLondon Jackie Tyler]] and [[Recap/DoctorWhoS29E6TheLazarusExperiment Francine Jones]].
*** Ryan gets a letter from his deadbeat dad apologizing for being absent [[Recap/DoctorWhoS37E1TheWomanWhoFellToEarth after Grace's death]].
** [[Recap/DoctorWhoS37E5TheTsurangaConundrum "The Tsuranga Conundrum"]] has [[Recap/DoctorWhoS30E10Midnight an automated vehicle that is attacked by a dangerous creature after its autopilot steers it onto a route it's never taken before]].
** [[Recap/DoctorWhoS37E7Kerblam "Kerblam!"]] begins with the Doctor receiving a delivery from the titular retailer... a ''very'' overdue delivery, as it's a [[NiceHat fez]] ordered [[Characters/DoctorWhoEleventhDoctor two incarnations]] back.
** [[Recap/DoctorWhoS37E9ItTakesYouAway "It Takes You Away"]]:
*** [[Recap/DoctorWhoS18E5WarriorsGate "Warriors' Gate"]] also contains mirror portals in a collapsing, labyrinthine VoidBetweenTheWorlds, though in this case the WhiteVoidRoom is on the other side of one of the portals, rather than being the void itself.
*** In [[Recap/DoctorWhoS33E7TheRingsOfAkhaten "The Rings of Akhaten"]], the climax has the Eleventh Doctor offer his memories to the parasite planet in the hopes of appeasing it, since no one else around has as many memories as he does. Here, Thirteen offers to stay with the Solitract since having just her, with all of her experiences, around will give it much more to work with than just Erik (which helps him realize that his "wife" is just an illusion). In both cases, the Doctor's solution doesn't work out, but there's an alternative — Eleven's memories can't compare to the ''infinite'' memories-that-never-were offered by Clara's leaf, and Thirteen can't stay after all because both universes will collapse, but she can promise to remember it as a friend and vice versa, which it accepts as enough.
*** As in [[Recap/DoctorWho2014CSLastChristmas "Last Christmas"]], a companion of the Doctor is tempted to stay in a false reality where a deceased loved one is still alive. The main difference is that the Solitract doesn't mean to harm Graham, whereas the Dream Crab was slowly killing Clara.
** [[Recap/DoctorWho2019NYSResolution "Resolution"]]: When [[spoiler:the Dalek]] controlling Lin researches Earth's defences and what it's up against, the Black Archive is referenced on the laptop screen. The Archive was last seen in [[Recap/DoctorWhoS35E8TheZygonInversion "The Zygon Inversion"]]. It's hinted that the [[spoiler:Dalek material]] that the controlled Lin steals from MDZ may have come from there.
** [[Recap/DoctorWhoS38E1E2Spyfall "Spyfall"]]:
*** This is [[Recap/DoctorWhoS30E4TheSontaranStratagem not the first time]] someone's tried to kill the Doctor by remote-controlling the satnav of a vehicle they're in and making it drive somewhere perilous.
*** The Doctor describes her GenderBender as "I've had an upgrade." Missy referred to the same thing as [[Recap/DoctorWhoS35E2TheWitchsFamiliar "Some of us can afford the upgrade!"]]
*** The Doctor's tuxedo coat sports a red inner lining like some of Twelve's coats. The double-breasted style calls to mind the green greatcoat that Eleven wore a few times in Series 6.
*** This is not the first time [[spoiler:a [[Recap/DoctorWhoS35E12HellBent seemingly ordinary building in a desert-like region]] has turned out to be a TARDIS in disguise]].
*** [[spoiler:The Master [[Recap/DoctorWhoS29E12TheSoundOfDrums likes it]] when the Doctor says his name.]]
*** The Doctor disapproves of a character's willingness to use weaponry, but [[Recap/DoctorWhoS25E3SilverNemesis not so much to let it be used to save the day]]. [[spoiler:We also get vague hints that the Doctor is more than they seem.]]
*** Graham, Ryan and Yaz's situation in part 2 when they're framed for a crime and forced to go on the run is very reminiscent of the Tenth Doctor, Martha and Captain Jack's situation in [[Recap/DoctorWhoS29E12TheSoundOfDrums "The Sound of Drums"]], complete with the female companion's phone calls home being traced. [[spoiler:That was also a story involving the Master.]]
*** [[spoiler:The Master [[Recap/DoctorWhoS30E17E18TheEndOfTime once used]] the drumbeat in his head to get the Doctor's attention. Here, the Doctor flips it to get ''his'' attention.]]
*** The Doctor [[spoiler:initiates a telepathic conference between herself and another Time Lord, saying "Contact", a technique not seen since [[Recap/DoctorWhoS10E1TheThreeDoctors "The Three Doctors"]]. She even refers to it as "classic".]]
*** The artron energy that time travellers soak up from the Time Vortex comes up again: [[spoiler:the Doctor and Yaz wound up in the Kasaavin's home dimension instead of dead because the entities were confused by it.]]
*** The Thirteenth Doctor [[Recap/DoctorWhoS37E3Rosa yet again]] gets grabbed in a chokehold by a male villain she's just intentionally angered, but is unbothered because the situation is actually going her way.
*** The Doctor shows up with two historical guest stars, and the companions fear that [[Recap/DoctorWhoS33E2DinosaursOnASpaceship they're being replaced]].
*** The Doctor being reminded to [[StableTimeLoop go back in time]] to rig Barton's airplane to save her companions' lives is reminiscent of [[Recap/DoctorWhoS31E13TheBigBang Eleven's time-hopping in an almost-destroyed universe]].
*** [[spoiler:Ada's protests about getting her memory wiped are reminiscent of those of [[Recap/DoctorWhoS30E13JourneysEnd Donna Noble]].]]
*** At the end, [[spoiler:the Master mentions an AwfulTruth involving [[Recap/DoctorWhoS37E2TheGhostMonument the Timeless Child]] as the reason for certain relatively recent actions of his.]]
** [[Recap/DoctorWhoS38E3Orphan55 "Orphan 55"]]:
*** Yet [[Recap/DoctorWhoS37E2TheGhostMonument again]], the Doctor and company are forced to flee from hostile creatures on the surface of a DeathWorld by heading into an underground tunnel.
*** [[spoiler:A possible future in which Earth is wrecked was previously seen in [[Recap/DoctorWhoS13E3PyramidsOfMars "Pyramids of Mars"]].]]
** [[Recap/DoctorWhoS38E4NikolaTeslasNightOfTerror "Nikola Tesla's Night of Terror"]]:
*** The Silurian blaster used by one of the Skithra is extremely similar to those used by the Silurians in [[Recap/DoctorWhoS31E8TheHungryEarth previous]] [[Recap/DoctorWhoS31E9ColdBlood new series]] [[Recap/DoctorWhoS32E7AGoodManGoesToWar appearances]].
*** The Skithra Queen asks the Doctor if she's ever seen [[spoiler:a [[Recap/DoctorWhoS38E1E2Spyfall dead]] [[Recap/DoctorWhoS38E3Orphan55 planet]]. The Doctor's actually seen that ''twice'' already this season.]]
** [[Recap/DoctorWhoS38E5FugitiveOfTheJudoon "Fugitive of the Judoon"]]:
*** Graham is [[Recap/DoctorWhoS38E1E2Spyfall once again]] mistaken for the Doctor.
*** [[spoiler:Ruth, as the Doctor, used a [[Recap/DoctorWhoS29E8HumanNature Chameleon]] [[Recap/DoctorWhoS29E9TheFamilyOfBlood Arch]] to hide her identity. Like the [[Recap/DoctorWhoS29E11Utopia Yana Master]], she's been undercover for years and heard voices.]]
*** An unusual gravestone alerts the Doctor that the seeming "grave" [[Recap/DoctorWhoS33E13TheNameOfTheDoctor isn't]]. [[spoiler:And both graves are connected to the TARDIS.]]
*** [[spoiler:Thirteen shows Gat a vision of [[Recap/DoctorWhoS38E1E2Spyfall the ruined Citadel]] to prove that she isn't lying about Gallifrey's destruction in her time.]]
*** [[spoiler:Ryan calls Jack "cheesy" a couple of times, calling back to how Mickey would use it first to insult and then affectionately tease Jack.]]
** [[Recap/DoctorWhoS38E6Praxeus "Praxeus"]]:
*** The fam uses [[Recap/DoctorWhoS37E5TheTsurangaConundrum com-dots]] to stay in touch while spread out across the Earth.
*** Much like [[Characters/DoctorWhoClaraOswald Clara]], Yaz has a go at being the Doctor. Thirteen sounds both impressed and annoyed at Yaz putting herself in danger.
*** Similar to the [[Recap/DoctorWhoS27E1Rose Autons]], Praxeus is drawn to Earth due to heavy amounts of plastic pollution. The Doctor even suggests that the Autons might be behind the plot, but rejects the idea as they don't work like a virus.
*** The Doctor materializes the TARDIS [[Recap/DoctorWhoS34E2IntoTheDalek around a ship about to explode]], saving the occupant.
** [[Recap/DoctorWhoS38E7CanYouHearMe "Can You Hear Me?"]]:
*** When Sonya asks where she's been, Yaz replies [[Recap/DoctorWhoS38E6Praxeus Madagascar, Hong Kong]] and [[Recap/DoctorWhoS38E5FugitiveOfTheJudoon Gloucester]]. Incidentally, Yaz's dad has heard about what happened in Gloucester and, once again, [[ConspiracyTheorist chalked it up to a conspiracy]].
*** This is [[Recap/DoctorWhoS32E11TheGodComplex not the first time]] the Doctor's encountered [[spoiler:an alien being formerly worshipped as a god who was sealed inside a space prison after the natives got wise]].
*** Ryan's nightmare involves a burning Earth and the Dregs from [[Recap/DoctorWhoS38E3Orphan55 "Orphan 55"]].
*** Graham's nightmare deals with his fear of his cancer returning and how he met Grace because she was his nurse, both details mentioned in his [[Recap/DoctorWhoS37E1TheWomanWhoFellToEarth first episode]].
*** The Doctor's brief nightmare is of the "Timeless Child" vision from [[Recap/DoctorWhoS38E1E2Spyfall "Spyfall"]].
*** Graham confides his worries to the Doctor and she's not sure how to comfort him, mentioning that she's still [[Recap/DoctorWhoS37E4ArachnidsInTheUK socially awkward]].
* ''Series/DonkeyHodie'': The episode "Walking Stick Blues" has Donkey and Panda trying to fix the walking stick with bubble gum. A similar event was mentioned in "A Big Favor For Grampy", when it's revealed Donkey once fixed Panda's spaceship with bubble gum. The scene that follows this has them using purple bamboo, which was the subject of a joke in "A Fair Way To Bounce", as a substitute for the stick.

* The US version of ''Series/{{The Office|US}}'' has a few Call Back jokes throughout the series. One of the more notable of these is the use of the expression "Win-Win-Win" to describe a favorable outcome of a compromise. According to the Season 2 episode "Conflict Resolution", both parties win for having a successful compromise, and Michael wins for having successfully managed a conflict. From this point on, "Win-Win" in almost any context is replaced by "Win-Win-Win".