Cast 33

1. 

   Kieron Moore

   Cmdr. Michael Haydon

2. 

   Lois Maxwell

   Kim Hamilton

3. 

   Donald Wolfit

   Prof. Merrity

4. 

   Bryan Forbes

   Jimmy Wheeler

5. 

   Jimmy Hanley

   Larry Noble

6. Barry Keegan

   Lefty

7. 

   Walter Hudd

   Professor Blandford

8. 

   Donald Gray

   Captain Ross

9. Thea Gregory

   Barbara Noble

10. Shirley Lawrence

    Ellen

11. Peter Neil

    Tony

12. Ryck Rydon

    Reporter

13. 

    Ronan O'Casey

    Reporter

14. 

    Robert O'Neil

    Reporter

15. 

    Alan Gifford

    Colonel Galloway

16. Charles Richardson

    General Barnett

17. 

    Carl Jaffe

    Professor Bechstein

18. Leonard Sharp

    Thomas the Watchman (uncredited)

19. Paul Beradi

    Reporter (uncredited)

20. Patrick Halpin

    Reporter (uncredited)

21. Terry Randall

    Reporter (uncredited)

22. 

    Bill Nagy

    Reporter (uncredited)

23. Terry Randall

    Reporter (uncredited)

24. John Wilder

    Reporter (uncredited)

25. Johnny Wyne

    Reporter (uncredited)

26. 

    Trevor Reid

    Simmons the Technician (uncredited)

27. 

    Bernard Bresslaw

    Technician (uncredited)

28. 

    Alastair Hunter

    Technician (uncredited)

29. Jane Dore

    Young Girl (uncredited)

30. Frank Sieman

    Gatekeeper (uncredited)

31. John Baker

    Official (uncredited)

32. Tony Quinn

    Jack the Barman

33. Tony Quinn

    Jack the Barman (uncredited)

Crew 12