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.
Doug McClure
John McEnery
Susan Penhaligon
Keith Barron
Anthony Ainley
Godfrey James
Bobby Parr
Declan Mulholland
Colin Farrell
Ben Howard
Roy Holder
Andrew McCulloch
Ron Pember
Grahame Mallard
Andrew Lodge
Stanley McGeagh
Steve James
Brian Hall
Peter Sproule