A deadly airship crash traps Challenger and his team seven years in the past.
Marguerite joins a trio of dashing bandits with a deadly secret.
To save Malone, Challenger and his team risk unleashing a supernatural killer.
Malone becomes a sleuth after discovering a knife which is linked to visions of the infamous murders of Jack the Ripper.
Roxton's former mentor appears on the plateau, bringing his tyrannical bag of tricks with him. Guest star Sean Taylor.
Roxton is transported back to the American West and must clear his name before he and all of his friends die.
Challenger experiments with a new fuel source in the hot air balloon and takes the other explorers along for a test ride; however, a storm drags the balloon into a dangerous underground world.
A powerful witch is bent on destroying Challenger and his science.
Suffering from the effects of a poison dart, a hallucinating Malone believes he's back in World War I.
A meteor plunges the Plateau into a new ice age which threatens the world.
Veronica falls in love with a 19th century musician and may be destined to disappear in another dimension.
An assassin linked to Marguerite's secret past drives her apart from Roxton and threatens the explorers' lives.
Challenger experiments with a mysterious energy source, throwing the explorers into Earth's cataclysmic future.
When archaeologists are murdered on the plateau, each member of the Challenger expedition is a suspect.
Three demons take the place of Challenger, Roxton and Marguerite and Finn is the only one who can free her friends and kill the demons.
Challenger is the first human to test his experimental substitute for food and winds up in a duel with apparitions from his own mind.
While protecting a crate of iridium ingots that were stolen from the Royal Navy five years ago, Lt. Drummond captures Challenger.
After touching her mother's pendant to a stone monolith, Veronica relives the last days she spent with her parents, discovering their fate and her own destiny.
A discovery reveals more of Marguerite's connection to the Druids and drives a wedge between her and Roxton.
The explorers encounter a baffling new phenomenon, which threatens to destroy the plateau.
While Roxton, Malone and Challenger are looking for a way off the plateau, Amazon women save them from an attack by a flock of pterodactyls.
A plane full of 21st-century tourists crashes in the jungle, bringing with it dreams of rescue. With Peter McCauley, Rachel Blakely, William Snow and Jennifer O'Dell.
At a haunted castle, the adventurers seem compelled to re-enact a romantic story of intrigue -- one that could end in death.
Roxton saves a young woman and steps right into Balar's trap.
Dinosaurs are behaving oddly, but the crew knows something is really wrong when Marguerite is nice to everyone.
An ancient map outlines an escape route; now the adventurers must prove to skeptics all they have seen.
Veronica unwittingly releases a savage giant from captivity, and Marguerite and the others must use all their talents to subdue him.
Captured by lizard men, Malone, Marguerite and Roxton are forced to fight as gladiators in the arena.
A woman who has saved the band from thirsty raptors will die if she cannot return immediately to the cave of the fountain of youth.
Marguerite recognizes as a trophy hunter a man who claims to be part of a Zoological Society rescue party.
Danielle crafts a voodoo doll of Roxton, putting him in her control.
Challenger, Marguerite and Veronica follow hunters tracks through gas defenses, looking for Challenger.
Alex, a kobold, takes Roxton, Malone and Veronica prisoner; Holt is constructing a uranium generator to allow the kobolds to live above ground.
Roxton and Marguerite are jailed, accused of robbery after walking through a brilliant light on the far side.
Aliens capture Veronica and Malone, forcing them to work in the mines alongside androids that have developed humanlike emotions and individuality.
Roxton, Marguerite, Challenger and Malone are marked after touching an amulet, convincing them to return it to the cave.
When the explorers enter an ancient temple, they release supernatural forces which threaten to destroy them.
When Marguerite and Roxton kiss, the earth moves, and the explorers are launched on a wild treasure hunt.
Werewolves make life a nightmare in the treehouse; Challenger faces a scientific challenge when Malone turns beastly.
During a thunderstorm visions of Summerlee, their lost colleague, lead the friends to the brink of destruction.
An escape route opens to the expedition when an airship lands on the plateau, but the mysterious pilot has other plans.
Scientist and explorer George Challenger learns from a dying colleague of a prehistoric world and organizes an expedition to find it.
Desperate to escape and more than a little greedy, Marguerite offers Veronica to a tribal chief in return for jewels and safe passage off the plateau for her group.
When Roxton is running from a tyrannosaur, the earth suddenly swallows him up; the party follows a river to an underground ocean.
Stung by a giant bee, Summerlee lies near death; Challenger seeks a way to repel an attack by the ape-men.
In order to free Challenger from her tribe, the team must retrieve the bones of a warrior queen's husband.
The adventurers come upon the ruins of a civilization destroyed by an enormous explosion.
After slapping a young king, Marguerite must choose between instant death or marrying the boy.
Travelers from the future arrive in the Lost World to manipulate history.
Veronica reunites with her father; the team must fight Kartas, a bounty hunter after Veronica's father.
Ramses, a vivified mummy, enlists Marguerite, Challenger and Malone to help him regain the Egyptian throne; a grieving dinosaur targets Summerlee.
A dying Roxton (William Snow) makes an evil pact to regain his life and save Marguerite (Rachel Blakely).
Roxton (William Snow) promises a teen's dying mentor to help the boy fulfill his destiny as savior of his people.
A gypsy fortuneteller's visions eerily come true, leaving the band to fear for Malone's life. With William Snow, David Orth, Rachel Blakely and Jennifer O'Dell.
Drakul and the Raiders shoot down the adventurers' balloon, beginning a game of cat and mouse.