During the US Civil War, Union POWs escape in a balloon and end up stranded on a South Pacific island, inhabited by giant plants and animals. They must use their ingenuity to survive the dangers, and to devise a way to return home. Sequel to '20,000 Leagues Under the Sea' .
Michael Craig
as Capt. Cyrus Harding
Joan Greenwood
as Lady Mary Fairchild
Michael Callan
as Herbert Brown
Gary Merrill
as Gideon Spilitt
Herbert Lom
as Captain Nemo
Beth Rogan
as Elena Fairchild
Percy Herbert
as Sgt. Pencroft
Dan Jackson
as Cpl. Neb Nugent
Harry Monty
as Pirate (uncredited)
