Cast 24

1. 

   Eric Braeden

   Dr Charles Forbin

2. 

   Susan Clark

   Dr. Cleo Markham

3. 

   Gordon Pinsent

   The President

4. 

   William Schallert

   CIA Director Grauber

5. 

   Georg Stanford Brown

   Dr. John F. Fisher

6. 

   Willard Sage

   Dr. Blake

7. 

   Alex Rodine

   Dr. Kuprin

8. 

   Martin E. Brooks

   Dr. Jefferson J. Johnson

9. 

   Marion Ross

   Angela Fields

10. 

    Dolph Sweet

    Missile Commander

11. 

    Byron Morrow

    Secretary of State

12. Lew Brown

    Peterson

13. 

    Sid McCoy

    Secretary of Defense

14. 

    James Hong

    Dr. Chin

15. 

    Robert Cornthwaite

    First Scientist

16. 

    Tom Basham

    Thomas L. Harrison

17. Leonid Rostoff

    Russian Chairman

18. Serge Tschernisch

    Translator

19. John Davey

    Military officer on phone (uncredited)

20. 

    Paul Frees

    Colossus (voice) (uncredited)

21. Fred Holliday

    Military Computer Entry - Missile Launch (uncredited)

22. 

    Robert Quarry

    Scientist (uncredited)

23. 

    Don Ross

    Logan US Air Force (uncredited)

24. 

    William Traylor

    Party Guest (uncredited)

Crew 19