Series Cast

1. 

   Eddie Albert

   Adm. Wiley Sloan

2. 

   John Carradine

   Ronald Bentley

3. 

   Alex Cord

   Dr. Sam Marlowe

4. 

   Robert Forster

   Comdr. Jeff Selkirk

5. 

   Frank Gorshin

   Dan Wesker

6. 

   Mark Harmon

   Peter Cabot

7. 

   Christopher Lee

   John McKenzie

8. 

   Tom Dunstan

   Agra Worker

9. 

   Bruce Heighley

   Technician

10. 

    Robert Paul Jordan

    (voice)

11. 

    John Berwick

    Crewman

12. 

    Laurence Haddon

    Cpt. Volero (uncredited)

13. 

    Julie Bennett

    Sylvia King

14. 

    Michael White

    PC18 Officer

15. 

    Sandy Simpson

    Moore

16. 

    John Brandon

    Chief Engineer (uncredited)

17. 

    Clete Roberts

    Newscaster (uncredited)

18. 

    Kirk Cameron

    Liam

19. 

    Hedley Mattingly

    Bailey

20. 

    Peter Stader

    Ed Linder (uncredited)

21. 

    Lawrence Levine

    (uncredited)

22. 

    Michael Evans

    Eric Whittaker

23. 

    Alan Fudge

    Lew Bascomb

24. 

    Warwick Sims

    Luke Crane

25. 

    Lori Lethin

    Maria (uncredited)

26. 

    Laird Stuart

    Paul (uncredited)

27. 

    Peter von Zerneck

    Hoffman

28. 

    Kip Niven

    Gantman (uncredited)

29. 

    George Innes

    Dave Winter

30. 

    Belinda Mayne

    Sally Crane

31. 

    Duncan Regehr

    Paul Ryker

32. 

    Colin Drake

    Old Man

33. 

    Jean Marsh

    Dr. Goldman

34. 

    John McIntire

    Sen. Oliver Bartholomew

35. 

    Emma Samms

    Lea McKenzie

36. 

    Christina Nigra

    Beth

37. 

    Irene Hervey

    Carrie (uncredited)

38. 

    John Ratzenberger

    Bill Sweeney

39. 

    Lawrence Benedict

    Young Bailey (uncredited)

40. 

    Michael M. Vendrell

    Robbie Cole (uncredited)

41. 

    Tom Willett

    Lambeth Walk Dancer (uncredited)

42. 

    Jeanette Nolan

    Sarah Bartholomew

43. 

    Alan Caillou

    Goliath Captain (uncredited)