Rick Marshall and his children Will and Holly are on a weekend expedition rafting down a river when an enormous earthquake diverts them to an eclectic alien world inhabited by dinosaurs, chimpanzee-like cavemen called Pakuni, and aggressive, humanoid lizard creatures called Sleestak.
When Dopey gets stuck in a tar pit, the Marshalls and Cha-Ka band together to try to pull him out.
While investigating the Mist Marsh, the guys stumble onto a mysterious woman who has a bit too much in common with Rick.
When Rick stumbles into a pig trap with three Sleestak, Will and Holly turn to Enik and Ta for help rescuing him.
When a mysterious energy hole appears in the ground and swallows Cha-Ka, Holly attempts a rescue.
Cha-Ka gets some help from Will and Holly stealing one of Big Alice's eggs to pass the Pakuni rite of manhood test.
The Zarn is to blame when gravity begins weighing down the inhabitants of the Land of the Lost.
When the sun stands still, the Sleestak wrongfully blame Rick for tampering with the pylon.
Holly tries to save Rick and Will after they go into a pylon to investigate a time door.
A quiet day of fishing, trap building and cake making turns serious when Holly is pricked by a poisonous plant.
When Holly spends the night alone with Cha-Ka, the Zarn causes a rift between Cha-Ka and Ta.
While searching the temple in the Lost City, Holly gets a ring stuck on her finger and Cha-Ka unwittingly awakens the Builder.
Following an earthquake, a specter that resembles Holly materializes and pleads for help.
Enik seeks Rick's help when the Sleestak execute a nefarious plan to plunge the world into darkness and overpopulate it with their offspring.
Spencer Milligan
Rick Marshall
Wesley Eure
Will Marshall
Philip Paley
Cha-Ka
Kathy Coleman
Holly Marshall
Walker Edmiston
Enik
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