Character Name : Dr Charles Forbin

Original Name : Eric Braeden

Gender : Male

Character Name : Dr. Cleo Markham

Original Name : Susan Clark

Gender : Female

Character Name : The President

Original Name : Gordon Pinsent

Gender : Male

Character Name : CIA Director Grauber

Original Name : William Schallert

Gender : Male

Character Name : Dr. John F. Fisher

Original Name : Georg Stanford Brown

Gender : Male

Character Name : Dr. Blake

Original Name : Willard Sage

Gender : Male

Character Name : Dr. Kuprin

Original Name : Alex Rodine

Gender : Male

Character Name : Dr. Jefferson J. Johnson

Original Name : Martin E. Brooks

Gender : Male

Character Name : Angela Fields

Original Name : Marion Ross

Gender : Female

Character Name : Missile Commander

Original Name : Dolph Sweet

Gender : Male

Character Name : Secretary of State

Original Name : Byron Morrow

Gender : Male

Character Name : Peterson

Original Name : Lew Brown

Gender : Male

Character Name : Secretary of Defense

Original Name : Sid McCoy

Gender : Male

Character Name : Dr. Chin

Original Name : James Hong

Gender : Male

Character Name : First Scientist

Original Name : Robert Cornthwaite

Gender : Male

Character Name : Thomas L. Harrison

Original Name : Tom Basham

Gender : Male

Character Name : Russian Chairman

Original Name : Leonid Rostoff

Gender : Male

Character Name : Translator

Original Name : Serge Tschernisch

Gender : Male

Character Name : Military officer on phone (uncredited)

Original Name : John Davey

Gender : Male

Character Name : Colossus (voice) (uncredited)

Original Name : Paul Frees

Gender : Male

Character Name : Military Computer Entry - Missile Launch (uncredited)

Original Name : Fred Holliday

Gender : Male

Character Name : Scientist (uncredited)

Original Name : Robert Quarry

Gender : Male

Character Name : Logan US Air Force (uncredited)

Original Name : Don Ross

Gender : Male

Character Name : Party Guest (uncredited)

Original Name : William Traylor

Gender : Male