Trailer
Cast
Susan Clark
Dr. Cleo Markham
Marion Ross
Angela Fields
Dolph Sweet
Missile Commander
Byron Morrow
Secretary of State
Sid McCoy
Secretary of Defense
Tom Basham
Thomas L. Harrison
Eric Braeden
Dr Charles Forbin
Georg Stanford Brown
Dr. John F. Fisher
Willard Sage
Dr. Blake
Martin E. Brooks
Dr. Jefferson J. Johnson
Paul Frees
Colossus (voice) (uncredited)
Don Ross
Logan US Air Force (uncredited)
William Traylor
Party Guest (uncredited)
Alex Rodine
Dr. Kuprin
Robert Cornthwaite
First Scientist
Robert Quarry
Scientist (uncredited)
Gordon Pinsent
The President
William Schallert
CIA Director Grauber
James Hong
Dr. Chin