The Land That Time Forgot

During World War I, Bowen Tyler (Doug McClure) and Lisa Clayton are passengers on the ship torpedoed by Captain Friedrich von Schoenvorts (John McEnery). Along with a few surviving British officers, Tyler persuades the other men to take over the surfacing submarine, which they use as their only chance for survival. After they confront the Germans on the deck, a battle ensues, and they seize the German U-boat. With no working radio, the crew is forced to navigate an uncharted island called Caprona, where dinosaurs still roam and primitive man coexists with lush vegetation.