Cast 47

1. 

   Don Knotts

   Henry Limpet

2. 

   Carole Cook

   Bessie Limpet

3. 

   Jack Weston

   George Stickel

4. 

   Andrew Duggan

   Harlock

5. 

   Larry Keating

   Admiral P.P. Spewter

6. 

   Oscar Beregi Jr.

   Nazi Admiral (as Oscar Beregi)

7. 

   Charles Meredith

   Fleet Admiral

8. 

   Elizabeth MacRae

   Ladyfish (voice)

9. 

   Paul Frees

   Crusty (voice)

10. 

    Wesley Gale

    Man Staring Into Window (uncredited)

11. Peter Adams

    Lieutenant (uncredited)

12. Leon Alton

    Officer at Fleet Admiral's Meeting (uncredited)

13. 

    Phil Arnold

    Short Fisherman (uncredited)

14. George Bruggeman

    Nazi Officer (uncredited)

15. Paul Busch

    Sonar Man (uncredited)

16. 

    Al Checco

    Sailor (uncredited)

17. Cordy Clark

    Giggling Girl (uncredited)

18. 

    Roydon Clark

    Sailor (uncredited)

19. 

    Sayre Dearing

    Passerby/Naval Officer at Meeting (uncredited)

20. George DeNormand

    Nazi Officer (uncredited)

21. Dan Dowling

    Naval Officer at Meeting (uncredited)

22. Harold Dyrenforth

    U-Boat Captain (uncredited)

23. 

    Louie Elias

    Sailor (uncredited)

24. Lisabeth Field

    Miss Barnes (uncredited)

25. Logan Field

    Lieutenant (uncredited)

26. Fred Fisher

    Officer at Fleet Admiral's Meeting (uncredited)

27. Walter Friedel

    Nazi Officer (uncredited)

28. George Golden

    Naval Officer at Fleet Admiral Meeting (uncredited)

29. Marv Goux

    Nazi Officer (uncredited)

30. John Hale

    Sailor (uncredited)

31. Sam Harris

    Officer at Fleet Admiral's Briefing (uncredited)

32. 

    George Holmes

    Scientist (uncredited)

33. Joseph La Cava

    Officer at Fleet Admiral's Briefing (uncredited)

34. Mike Lally

    Naval Officer at Meeting (uncredited)

35. 

    Harold Miller

    Officer at Fleet Admiral's Briefing (uncredited)

36. 

    Charles Morton

    Boat Captain (uncredited)

37. Henry Norell

    Sailor (uncredited)

38. Jack Pepper

    Sport Fishmern (uncredited)

39. Montie Plyler

    Helmsman (uncredited)

40. Felix Reinsch

    Submarine Captain (uncredited)

41. Waclaw Rekwart

    Passerby (uncredited)

42. Heinz Sadler

    Sonar Man (uncredited)

43. 

    Scott Seaton

    Old Man in Shipping Office (uncredited)

44. Jack Shea

    Sailor (uncredited)

45. John Truax

    Policeman (uncredited)

46. Edward Wermel

    Scientist (uncredited)

47. 

    Feridun Çölgeçen

    Scientist (uncredited)

Crew 26