The Land That Time Forgot (1974)

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.

Directed by: Kevin Connor

Starring: Doug McClure, John McEnery, Susan Penhaligon, Keith Barron, Anthony Ainley, Godfrey James

Links: IMDb, Movie posters, Movie stills