Walter Pidgeon
Admiral Harriman Nelson
Robert Sterling
Captain Lee Crane
Barbara Eden
Lieutenant Cathy Conners
Peter Lorre
Comm. Lucius Emery
Joan Fontaine
Dr. Susan Hiller
Michael Ansara
Dr. Miguel Alvares
Frankie Avalon
Lieutenant Chip Romano
John Litel
Vice Admiral B.J. Crawford
Howard McNear
Congressman Llewellyn Parker
Charles Tannen
CPO Mack Gleason
Mark Slade
Seaman Jimmy 'Red' Smith
Jonathan Gilmore
Seaman George Young
William Herrin
Crew Member (Uncredited)
Robert Buckingham
Crew Member (Uncredited)
Richard Adams
Crew Member (Uncredited)
Jimmy Murphy
Crew Member (Uncredited)
George Diestel
Lieutenant Hodges (Uncredited)
Larry Gray
Dr. Newmar (Uncredited)
David McLean
Ned Thompson (Uncredited)
Edward Rickard
Officer (Uncredited)
Charles Dierkop
Seaview Pilot (Uncredited)
Kendrick Huxham
UN Committee Chairman (Uncredited)
Art Baker
UN Commentator (Uncredited)
Rodger Terry
Guard (Uncredited)
Brad Brown
Guard (Uncredited)
Raoul Freeman
Delegate (Uncredited)
Al Bain
Delegate (Uncredited)
Harry Baum
Delegate (Uncredited)
Benjie Bancroft
Delegate (Uncredited)
Michael Cirillo
Delegate (Uncredited)
Harry Denny
Delegate (Uncredited)
John Giovanni
Delegate (Uncredited)
Bhupesh Guha
Delegate (Uncredited)
Esther Ying Lee
Delegate (Uncredited)
Robert Locke Lorraine
Delegate (Uncredited)
George Nardelli
Delegate (Uncredited)
Paul Power
Delegate (Uncredited)
Paul Ravel
Delegate (Uncredited)
Scott Seaton
Delegate (Uncredited)
Leslie Sketchley
Delegate (Uncredited)
Ray Spiker
Delegate (Uncredited)
Hal Taggart
Delegate (Uncredited)
Robert Strong
Delegate (Uncredited)
Ron Nyman
Crew Member (uncredited)
