A children's adventure film about a couple of American survivors held captive on a German sub that goes off course. The sub runs out of fuel and is forced to land on an uncharted island in the Antarctic. The island is filled with prehistoric animals and cavemen. There is also a primitive oil refinery, which the crew finally reaches by fighting off gigantic animals and unfriendly natives. The special effects are unrealistic, as are the dialog and performances. However, despite everything, the picture still makes for great fun. Sequel: THE PEOPLE THAT TIME FORGOT (1977).