During World War I, a German U-boat sinks a British ship and takes the survivors on board. After it takes a wrong turn, the submarine takes them to the unknown land of Caprona, where they find dinosaurs and neanderthals.
Genre: Adventure, Fantasy, Science Fiction
Starring: Doug McClure, John McEnery, Susan Penhaligon, Keith Barron, Anthony Ainley
Directed & Produced by: Julie Harris, Alan Hume, Bert Davey, Ian Wingrove, John Peverall
Release date: 8/13/1974
Running time: 90 minutes
IMDb Rating: 5.4/10 by 78 users