All or Nothing
After the fierce battle with Drakul and the events on the bridge, it's up to Marguerite and Veronica to find their friends. With a little help from Tribune they're reunited but still a ways off from the tree house. The explorers go looking to borrow a boat at a local fishing village only to find that no one fishes and there are no boats.
Amazons
In the attempt to save a young woman from a raptor, Challenger gets injured himself. Roxton and Malone take him to the village of the group of women that saved him where the men are welcomed with open arms. When they don't return to the tree house, Marguerite and Veronica go searching for the men and find out the men are at the Amazon village and they're in danger.
Tourist Season
While making repairs to the windmill, a storm suddenly appears. A flash of lightning, and a helicopter appears. A family of three and a pilot from the future are stranded on the plateau. Can the explorers fix their helicopter and get them home?
Divine Right
A mysterious horse appears and takes Roxton to a village where he is named king. When Roxton sees that not all is quite right in the kingdom, he sends for the help of his friends. Can they figure out the mystery of the monster, the village, and stop evil Balar's plan?
Stone Cold
While out mapping, Marguerite, Roxton, and Malone find a young woman who gives them an ominous warning before she dies. A storm appears out of nowhere forces the explorers to find shelter in an old castle. All they want to do is stay warm and wait out the storm, but the castle has other plans for them.
Skin Deep
Marguerite goes into a cave looking for gems, but instead finds something else. She returns to the tree house and does not act like herself which raises the suspicions of the others. Meanwhile, Veronica and Malone meet up with Assai and find out that many of the Zanga have gone missing and there is a strange sickness that Marguerite may have contracted. Can they save Marguerite and the missing Zangas?
London Calling
Malone follows some clues that he got from native stories which lead him to a cave where he finds a map for the route off the plateau. Veronica stays behind in search of her parents, but the others continue on and make it to London. So why isn't it a dream come true?
The Prisoner
Veronica gets a tip from an old lady that her missing parents are in El Dorado. She follows the woman's directions only to find out she was tricked. She unknowingly let out an evil giant. It's up to the others to make sure he goes back where he belongs.
The Games
Tribune's back and once again, he's gotten himself into trouble. Roxton, Malone, and Marguerite are captured along with Tribune and taken back to the lizard city to Empress Centuria. Malone must pretend to be Challenger and make gunpowder, while Roxton finds himself chained to Tribune as they fight for their lives as gladiators. Marguerite does her best working behind the scenes to keep them all alive until Veronica and Challenger arrive.
The Source
The explorers get saved from a raptor attack by a young woman who needs help getting home. They offer their help escourting her as thanks for helping them. On the way there, the woman claims she has found the Fountain of Youth. Too good to be true or too good to resist?
Trophies
Veronica tries to stop a man from kidnapping a baby trog only to find he sets his sights on her. After she makes her way back to the tree house, she finds out that the man is Avery Burton and he's here to take her friends back to London. Veronica still doesn't trust him, while Marguerite has her own suspicions.
Voodoo Queen
Roxton finds a young woman in the jungle, Danielle, who seduces him and tells him how her village was attacked by apemen leaving her the only one alive. He takes her back to the tree house where the men make her feel welcomed while the women are suspicious. Roxton decides to take Danielle back to her village, and while he's gone, the explorers find evidence of voodoo and strange things start to happen.
The Guardian
While out gathering herbs with Marguerite and Veronica, Challenger wanders and accidentally springs a trap and gets knocked unconscious. He gets taken to a village that is guarded by a plant and an amonia surrounded jungle. Marguerite and Veronica follow to try to find him and get trapped in the village themselves. The village full of children and the guardian plant will not allow them to leave.
Under Pressure
While out looking for truffles, Veronica and Marguerite meet a man, Alex, and seem quite taken by him. Challenger's working on a new invention when it gets damaged by a strange glowing creature. Some of the explorers find themselves captured by the strange creatures and taken underground where Professor Challenger runs into an old friend and has to make a tough decision, the lives of his friends or science.
Quality of Mercy
The explorers find themselves face to face with aliens on the plateau!
The Outlaw
Marguerite and Roxton examine a cave where they encounter a strange light right before they stumble upon a village. Upon their entrance into the town, Marguerite gets mistaken as an outlaw and arrested with Roxton as her accomplice. Veronica, Malone, and Challenger follow after Marguerite and Roxton only to find themselves robbed by the real outlaw.
Mark of the Beast
A monkey raids the tree house and steals one of Marguerite's necklaces. While Marguerite and Roxton chase after it, Marguerite finds a peculiar stone that leaves a mark on whoever's hand on touches it. A tribe sets out looking for their lost stone while strange happens to the explorers who were marked for touching it.
Survivors
Marguerite and Challenger find a strange cave with three freezes of guardians. Marguerite springs a booby trap and falls onto some sharp spikes leaving Challenger to go back to the tree house for help. Meanwhile Marguerite comes face to face with her best friend Adrienne Montclair who Marguerite believed to be dead for over twelve years.
The Pirate's Curse
Marguerite and Roxton fall into a dark pit and stumble across a pirate's chest of treasure. They find an inscription of a curse, but Marguerite convinces Roxton to bring the chest back to the tree house. Challenger and Malone find the captain's journal and what seems to be a description of the Bermuda Triangle. They go off searching for clues around the Inland Sea leaving Roxton and Veronica to cause mischief with Marguerite's treasure.
The Visitor
Veronica and Malone are out at night when Malone gets scratched by a monster. Malone accidentally shoots Veronica's old childhood friend, Danu. When Malone gets dangerously ill, Veronica, Challenger, and Roxton go looking for a cure leaving Marguerite to fend off the beast that Malone turns into. Are there really werewolves on the plateau?
A Man of Vision
Challenger investigates mysterious clouds on the edge of the plateau when a rain storm appears out of nowhere. At the tree house, Malone sees Summerlee's ghost and goes chasing after it. After spending a night in a cave to wait out the storm, Marguerite, Roxton, and Challenger realize they had the same dream about Summerlee. When Veronica returns to the tree house, she also sees Summerlee. Where is he leading them all?
Into the Fire
A navy dirigible appears on the plateau and it looks as if the explorers have hope once again of going home. They find evidence that Malone went chasing after it, but no one can find Malone. After finding the captain, Askwith, they search for the dirigible and make the necessary repairs and hope they can find Malone and head back home.
