Actors: Doug McClure, John McEnery, Susan Penhaligon, Keith Barron, Anthony Ainley, Godfrey James, ...
Duration: 91 min
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.
