Top Billed Cast

1. 

   Margaret Lockwood

   Frances Gray

2. 

   Dane Clark

   Bill Casey

3. 

   Marius Goring

   Commandant Anton Razinski

4. 

   Naunton Wayne

   Mr. Hedgerley

5. 

   Wilfrid Hyde-White

   Mr. Luke

6. 

   Eugene Deckers

   Alf

7. 

   Olaf Pooley

   Detective-Interrogator

8. 

   Gladys Henson

   Attendant

9. 

   Paul Hardtmuth

   Priest

10. 

    Michael Hordern

    Lab Director Owens

11. 

    George Benson

    Sandwich Stand Customer

12. 

    Eric Pohlmann

    Joe - the bartender

13. 

    John Horsley

    Customs Officer

14. 

    Patric Doonan

    Customs Man

15. 

    Joan Haythorne

    Judy

16. 

    Jill Balcon

    Wardress (uncredited)

17. 

    Hyma Beckley

    Café Mimosa Patron (uncredited)

18. 

    John Boxer

    Police Sergeant at Customs Café (uncredited)

19. 

    Ernest Butcher

    Tom - Lab Assistant (uncredited)

20. 

    Daniel Brown

    Train Passenger (uncredited)

21. 

    Robert Cawdron

    Soldier at Station Checkpoint (uncredited)

22. 

    Anton Diffring

    Officer at Station (uncredited)

23. 

    Toni Frost

    Stewardess (uncredited)

24. 

    John Gabriel

    Night Field Telephone Officer (uncredited)

25. 

    Charles Hammon

    Train Passenger in Platform Line-up (uncredited)

26. 

    Philo Hauser

    Waiter (uncredited)

27. 

    John G. Heller

    Soldier at Station Check Point (uncredited)

28. 

    Noel Johnson

    Frank Conway (uncredited)

29. 

    Sam Kydd

    Customs Man (uncredited)

30. 

    Richard Marner

    Soldier on Train (uncredited)

31. 

    Louis Matto

    Café Mimosa Waiter (uncredited)

32. 

    Anthony Newley

    Operator (uncredited)

33. 

    Michael Ritterman

    The ‘Tail’ (uncredited)

34. 

    Lance Secretan

    Alan (uncredited)

35. 

    Dinah Sheridan

    Train Passenger at Checkpoint (uncredited)

36. 

    Ewen Solon

    Enemy Scientist (uncredited)

37. 

    Emile Stemmler

    Soldier at Station Checkpoint (uncredited)

38. 

    Robert Vossler

    Day Sentry at First Checkpoint (uncredited)

39. 

    John Wilder

    Customs Officer (uncredited)

40. 

    Billy Wilmot

    Café Mimosa Customer (uncredited)