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.

• Eddie Albert
• John Carradine
• Alex Cord
• Robert Forster
• Frank Gorshin
• Mark Harmon
• Christopher Lee
• Tom Dunstan