Eric Braeden
Dr Charles Forbin
Cast (24)
Susan Clark
Dr. Cleo Markham
Gordon Pinsent
The President
William Schallert
CIA Director Grauber
Georg Stanford Brown
Dr. John F. Fisher
Willard Sage
Dr. Blake
Alex Rodine
Dr. Kuprin
Martin E. Brooks
Dr. Jefferson J. Johnson
Marion Ross
Angela Fields
Dolph Sweet
Missile Commander
Byron Morrow
Secretary of State
Lew Brown
Peterson
Sid McCoy
Secretary of Defense
James Hong
Dr. Chin
Robert Cornthwaite
First Scientist
Tom Basham
Thomas L. Harrison
Leonid Rostoff
Russian Chairman
Serge Tschernisch
Translator
John Davey
Military officer on phone (uncredited)
Paul Frees
Colossus (voice) (uncredited)
Fred Holliday
Military Computer Entry - Missile Launch (uncredited)
Robert Quarry
Scientist (uncredited)
Don Ross
Logan US Air Force (uncredited)
William Traylor
Party Guest (uncredited)
Crew (19)
Joseph Sargent
Director
Terry Kellum
Sound
John McCarthy Jr.
Set Decoration
Robin S. Clark
Assistant Director
Waldon O. Watson
Sound
Ronald Pierce
Sound
Ruby R. Levitt
Set Decoration
Stanley Chase
Producer
Edith Head
Costume Design
Alexander Golitzen
Art Direction
Michel Colombier
Original Music Composer
Folmar Blangsted
Editor
John J. Lloyd
Art Direction
Gene Polito
Director of Photography
Larry Germain
Hairstylist
D.F. Jones
Novel
Bud Westmore
Makeup Artist
James Bridges
Screenplay
Bert Steinberger
Dialogue Coach