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
Adm. Michael Matthews
Robert Wagner
Brett
Rosemary Forsyth
Lia Holmes
Robert Colbert
Cmdr. Woody Patterson
Burr DeBenning
Aguila
Susana Miranda
Elena
Paul Stewart
Barton
Whit Bissell
Prof. Holmes
Richard Basehart
The President
Joseph Cotten
Dr. Ziegler
James Darren
Dr. Talty
Sugar Ray Robinson
Capt. Hunter
Charles Dierkop
Quinn
Larry Pennell
Bill Holmes
William Bryant
Capt. Lunderson
