Harry Hoyt directed the first film version of the dinosaur-inhabited land that time forgot, featuring wonderful early stop-motion animation by Willis O'Brien. The silent film, based on a story by Sir Arthur Conan Doyle, features Lewis Stone and the great Wallace Beery as Professor Challenger, as the intrepid explorers who travel to a remote jungle of Brazil to prove the Professor's theories that some prehistoric life might yet still remain. When the company is attacked by an apelike human, they begin to believe, but they have yet to meet the terror and wonder of the supposedly lost Allosaurus, Stegosaurus and Pterodactyl, sixty-five million years past their expiration date!