During World War II the passenger liner "Goliath" is sunk by a German submarine. Portions of the ship's hull remain airtight, and some of the passengers and crew survive. Over the decades they build a rigidly regulated society completely isolated from the surface world until, in contemporary times, a diving team begins to explore the wreck.
Adm. Wiley Sloan
Ronald Bentley
Dr. Sam Marlowe
Comdr. Jeff Selkirk
Dan Wesker
Peter Cabot
John McKenzie
Cpt. Volero (uncredited)