During World War I, a German U-boat sinks a British passenger ship and takes the survivors aboard. After getting lost in fog, the submarine surfaces near the unknown island of Caprona, a lost world where they find dinosaurs and Neanderthals.
Doug McClure
as Bowen Tyler
John McEnery
as Captain Von Schoenvorts
Susan Penhaligon
as Lisa Clayton
Keith Barron
as Bradley
Anthony Ainley
as Dietz
Godfrey James
as Borg
Bobby Parr
as Ahm
Declan Mulholland
as Olson
Colin Farrell
as Whiteley
Ben Howard
as Benson
Roy Holder
as Plesser
Andrew McCulloch
as Sinclair
