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 byKevin Connor
Written byEdgar Rice Burroughs, James Cawthorn, Michael Moorcock
CountryUnited Kingdom, United States
Runtime90 min
On screen
Doug McClure
John McEnery
Susan Penhaligon