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
Bruce Heighley
Robert Paul Jordan
John Berwick
Laurence Haddon
Julie Bennett
Michael White
Sandy Simpson
John Brandon
Clete Roberts
Kirk Cameron
Hedley Mattingly
Peter Stader
Lawrence Levine
Michael Evans
Alan Fudge
Warwick Sims
Lori Lethin
Laird Stuart
Peter von Zerneck
Kip Niven
George Innes
Belinda Mayne
Duncan Regehr
Colin Drake
Jean Marsh
John McIntire
Emma Samms
Christina Nigra
Irene Hervey
John Ratzenberger
Lawrence Benedict
Michael M. Vendrell
Tom Willett
Jeanette Nolan
Alan Caillou