The Land That Time Forgot (1975)

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.

Filmed at Shepperton Studios in 1976 and restored and remastered at Pinewood's Archive, Preservation and Restoration Facility in 2012