A group of 21st-century colonists inhabit an underwater city called Pacifica. Originally intended as a purely scientific installation, the U. S. government wants to stash all its gold reserves from Fort Knox there, along with a fantastic new radioactive element. The brother of Pacifica's returning former commander plans to steal the gold and on top of that, the city faces destruction by an asteroid from outer space!
Stuart Whitman
as Adm. Michael Matthews
Robert Wagner
as Brett
Rosemary Forsyth
as Lia Holmes
Robert Colbert
as Cmdr. Woody Patterson
Burr DeBenning
as Aguila
Susana Miranda
as Elena
Paul Stewart
as Barton
Whit Bissell
as Prof. Holmes
Richard Basehart
as The President
Joseph Cotten
as Dr. Ziegler
James Darren
as Dr. Talty
Sugar Ray Robinson
as Capt. Hunter
