The Lost World

English zoology professor George Edward Challenger (Claude Rains) discovers a "lost world" of Jurassic reptiles isolated within the thick, unexplored Amazon. To prove their existence, he organizes a group expedition with playboy Lord Roxton (Michael Rennie), American socialites Jennifer Holmes (Jill St. John), her brother David Holmes (Ray Stricklyn), news writer and photographer Ed Malone (David Hedison) and Challenger's colleague and rival Professor Walter Summerlee (Richard Haydn). Local pilot Gomez (Fernando Lamas) and travel guide Costa (Jay Novello) lead the pack on an awesome havoc-wreaking adventure where dinosaurs from long ago still roam free. (official distributor synopsis)