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