The Journey Begins: Part 1 of the pilot episode. The adventures go to an isolated plateau in the Amazon jungle in hopes of finding a dinosaur.
Stranded: Part 2 of the pilot episode. The group find themselves stuck on the plateau.
More Than Human: The group is enslaved by a civilization of lizard people and must contend with their ambitious leader, Tribune.
Nectar: Summerlee is stung by a giant bee. The only antidote is the bees' royal jelly, so the group must infiltrate the hive.
Cave of Fear: Challenger is captured by a village and their queen will only release him if Roxton and Marguerite can retrieve an item from a cave. However, when they enter, they begin to hallucinate their greatest failures.
Salvation: Summerlee is arrested by a tribe and accused of witchcraft after he saves a drowning little girl with CPR.
Blood Lust: Roxton is turned into a vampire, so his friends struggle to cure him. Meanwhile, a man becomes smitten with Veronica and challenges Malone to a duel for the right to marry her.
Out of Time: Roxton, Malone, and Marguerite are captured by druids who say Marguerite must fulfill an ancient prophecy. Meanwhile, Veronica finds an abandoned baby.
Paradise Found: The group find a supposed paradise where Veronica suspects her parents are.
The Beast Within: A shaman called Lento heals Malone, but goes mad, leading the male explorers on a chase through the jungle. Meanwhile, Veronica and Marguerite get stuck in an old well.
Creatures of the Dark: Challenger, Malone, and Marguerite are trapped in a cave by a tribe of cave dwellers, when their leader, a blind oracle, orders them kept indefinitely. Veronica, Roxton, and Summerlee attempt to rescue them, but must deal with Vantu headhunters.
Tribute: The Hikari tribe regularly exploits the Tinta tribe, so Roxton, Veronica, and Challenger teach the Tinta how to fight back. Meanwhile, Malone, Marguerite, and Summerlee are captured by the pilot Hans Dressler, who thinks it is still World War I.
Absolute Power: When Challenger finds an altar and crystal marked with the symbol of an atom, he experiments with them and is injured by an explosion. While his friends try to save him, he dreams that he has gained godlike powers, making him arrogant and reckless.
Camelot: A young boy-king named Gawain becomes enamored with Marguerite and tries to force her to marry him. Gawain's Grand Vizier Vordred schemes to kill him and claim the throne.
Unnatural Selection: One of Challenger's old colleagues, Dr. Hargroove, surfaces and Challenger, Roxton, and Veronica discover he is performing unethical genetic experiments. Meanwhile, Summerlee, Marguerite, and Malone find an elderly woman with a radio, but she claims to be an exiled fairy queen and will only give up the radio if they help break her curse.
Time After Time: A woman appears, claiming to be from the future, and is determined to kill Marguerite or at least make sure she never leaves the plateau. A man appears, also claiming to be from the future, and is determined to help the group escape the plateau.
Prodigal Father: The group rescues a man from slavers and he appears to be Veronica's long lost father.
Birthright: Challenger, Malone, and Marguerite find an Egyptian civilization and get involved in a power struggle. Meanwhile, Summerlee is relentlessly chased by a T-Rex who thinks he killed her babies, so Roxton and Veronica try to save him.
Resurrection: Norse warriors mortally wound Roxton and kidnap Marguerite. A sinister little boy named Osric offers to bring Roxton back, but in exchange, he must murder an old man named Bergen. Meanwhile, Malone and Veronica defend the Treehouse from invaders.
The Chosen One: Roxton helps a young boy marked as the chosen one free his people from invaders. Meanwhile, Veronica becomes suspicious and jealous when Malone starts to fall for a woman named Kaya.
Prophecy: A fortune teller predicts the group's futures, and they start coming true in unexpected ways. Meanwhile, Challenger and Summerlee are trapped by hyper-intelligent raptors.
Barbarians at the Gate: Tribune, who has gained gunpowder, is at war with a barbarian tribe, and the group gets caught in the middle.
Season 2
All or Nothing: Still reeling from Summerlee getting killed, the group and Tribune fall into a river and wash into a village ruled by a tyrant.
Amazons: Roxton, Malone, and Challenger save an Amazon from an attacking dinosaur and are invited to her village. The Amazons are happy to meet men after so long, but hold a dark secret.
Tourist Season: After a storm, a helicopter with a family of modern day tourists and their pilot arrives on the plateau. While the group befriends them and tries to repair the helicopter, a hostile tribe wants to claim it.
Stone Cold: The group takes shelter from the rain in a mysterious castle, but when they, except Challenger, change out of their wet clothes into some formal outfits, they become possessed by their original wearers.
Divine Right: Roxton finds a horse that leads him to a kingdom that is threatened by dragon where he is declared king. The royal advisor Balar plots his death.
Skin Deep: An alien entity starts possessing various bodies, including dinosaurs. The group is horrified when Marguerite is possessed.
London Calling: The group finally finds a passage off the plateau and returns to London, but Malone starts to notice something is wrong with reality.
The Prisoner: Veronica is tricked into releasing an evil giant from his prison, so the group must subdue him.
The Games: Empress Centuria takes over the lizard people and orders her former lover Tribune hunted down. He and some of the group are captured. Unable to tell humans apart, she mistakes Malone for Challenger and orders him to make gunpowder, while sentencing Tribune and Roxton to be gladiators.
The Source: During a drought, the group meets a woman named Ana who has water from the Fountain of Youth. Her supply is dwindling, so she asks them to escort her to the fountain before she reverts to her true age and dies.
Trophies: A group of hunters arrive and claim they were sent to rescue the group, but they are also obsessed with hunting sentient prey, including Veronica.
Voodoo Queen: A woman named Danielle uses voodoo to enslave Roxton and an army of zombies and troglodytes.
The Guardian: The group finds a village guarded by a man-eating plant that also sprays poisonous gas.
Under Pressure: A race of rock people abduct the group and want Challenger's scientific expertise so that they can survive above ground indefinitely.
The Outlaw: Roxton and Marguerite find a village, but a masked woman steals from the local pub and frames them for it.
Quality of Mercy: Veronica and Malone are captured and put in a slave labor camp run by machines and aliens.
Mark of the Beast: A talisman leaves a mark on whoever touches it and makes them slowly transform into animals.
Survivors: While exploring a temple, Marguerite and Challenger are wounded by a booby trap, then they are astonished when their old friends Adrienne and William appear. The pair have sinister plans for them.
The Pirate's Curse: The group finds a supposedly cursed pirate treasure. Not believing in the curse, Marguerite takes it while Malone and Challenger try to decipher the pirate's journal. The pirate's descendant attacks them for the treasure.
The Visitor: Malone is slashed by a werewolf and starts to slowly turn. While the others try to cure him, Veronica's childhood sweetheart Danu, who is also a werewolf, is determined to turn her as well.
A Man of Vision: The group experiences visions of Summerlee. While the rest of the group fends off cannibals, Malone becomes entranced and follows the visions to the now dry waterfall where Summerlee was last seen, ignoring his injuries.
Into the Fire: A British airship appears. Malone manages to board it first, but finds it empty except for Captain Mark Askwith, who knocks him out. Askwith meets the others and claims not to have seen Malone, then offers them a ride off the plateau.
Season 3
Out of the Blue: Askwith has tricked Challenger, Roxton, and Marguerite into taking his place onboard the cursed airship. As they relive the airship's final voyage, Veronica pursues Askwith to try to return him to it.
The Travelers: A group of bandits save Marguerite from cannibals and their handsome leader, Francois Locke, persuades her to join them. As the group pursues them, they learn the bandits are more than human.
Eye for an Eye: In a dinosaur graveyard, Roxton kills a triceratops out of anger. The graveyard's guardian punishes him by sentencing him to be hunted.
True Spirit: Veronica becomes convinced that Malone is trapped in the spirit world and attempts to free him. Unfortunately, an evil warlord called Saros tries to hijack her efforts to resurrect himself.
The Knife: Malone finds a knife that gives him visions of the Jack the Ripper case but with his friends recast as the characters. Meanwhile, two of the suspects of the case, Sir William Gull and Robert Anderson, appear.
Fire in the Sky: The group finds a wounded man who dies claiming Pierson Rice, a vainglorious hunter who Roxton used to admire but now despises, is alive and in danger.
Dead Man's Hill: Roxton finds a noose hanging in the jungle and suddenly finds himself in the Wild West with his friends recast as characters in this setting. He has been accused of a crime and Challenger is a cruel sheriff obsessed with killing him, Malone is a cold-hearted gunslinger, Veronica runs the saloon, and Marguerite is a rich widow. Roxton struggles to make sense of this and return to his own world.
Hollow Victory: Challenger repairs the hot air balloon, but when they take a test flight, they fall into an extinct volcano and are stranded in a subterranean world.
A Witch's Calling: A witch named Dame Alice wants to destroy Challenger for his use of science, and sends her apprentices to capture Roxton and Malone to get them out of the way.
Brothers in Arms: Malone is hit with a poison dart and wanders through the jungle while reliving his traumatic experience in World War I.
Ice Age: The plateau is struck by a meteor and begins to grow ever colder.
The End Game: The Grim Reaper, in the form of a seductress, kidnaps Roxton and forces him to play games with his life and the lives of his friends on the line.
Phantoms: Veronica finds a 19th century village in a fog choked valley and begins to fall in love with Thomas Ducart, a handsome musician. Challenger grows suspicious of him.
The Secret: A ninja assaults Veronica and leaves behind an ivory tile as a calling card. When Marguerite sees it, she realizes her darkest secret has come back to haunt her.
Finn: Challenger creates a teleportation device and tries to send the group back to London, but they appear in a post-apocalyptic world in the year 2033. They befriend a woman named Finn and take her back with them, determined to prevent that future from happening.
Suspicion: An archeological expedition opens a buried urn. The group stumbles upon them to find all but two dead, and the two are paranoid that the other is possessed by a demon, then believe the demon has possessed one of the group.
The Imposters: Challenger, Roxton, and Marguerite enter a cave and are replaced by demons. Finn recognizes one of them as the one responsible for the war that ravaged her timeline.
The Elixir: Challenger tries to invent a substitute for food, but when he tries it, he starts slowly dying and suffering from hallucinations. His friends struggle to treat him with their limited medical knowledge.
Tapestry: The group finds a crashed WWI plane with the pilot, Lieutenant Drummond, who has been stranded on the plateau for five years. The plane's cargo is a shipment of iridium ingots stolen from the Royal Navy. Challenger and Marguerite remember how MI5 interrogated them about the theft.
Legacy: After touching her mother's pendant to a monolith, Veronica experiences memories of her parents, but is shocked that they do not match what she remembered about them.
Trapped: Marguerite and Roxton are trapped in a cave-in while Challenger loses his memories. Meanwhile, Veronica and Finn find another secret Veronica's parents left behind.
Heart of the Storm: The plateau is hit with a storm and portals to different realities and timelines begin to open. note Like the previous season finales, this one ends on a cliffhanger, but the show was sadly not renewed for a fourth season.
