Reparto 20

1. 

   Gene Evans

   Steve Karnes

2. 

   André Morell

   Prof. James Bickford

3. 

   Leigh Madison

   Jean Trevethan

4. 

   John Turner

   John

5. 

   Alastair Hunter

   Dr. C. A. Morris, the village doctor

6. 

   Lloyd Lamble

   Senior Admiral, at the Admiralty

7. 

   Jack MacGowran

   Dr. Sampson, the paleontologist

8. 

   Maurice Kaufmann

   Mini Submarine Officer

9. Henri Vidon

   Tom Trevethan

10. 

    Patrick Jordan

    Photo Lab Aide

11. 

    Howard Lang

    Naval Commader, at the "Valkyrie" wreck (uncredited)

12. 

    Leonard Sachs

    Dialogue Scientist at Conference (bit)

13. Ernest Blyth

    Scientist at Conference (uncredited)

14. Neal Arden

    TV Newscaster (uncredited)

15. Paul Beradi

    Man Listening to Car Radio (uncredited)

16. 

    Max Faulkner

    PLA Radio Operator (uncredited)

17. 

    Neil Hallett

    Dr. Sampson's Helicopter Pilot (uncredited)

18. 

    André Maranne

    French Radio Officer (uncredited)

19. 

    Derren Nesbitt

    The Radar Operator, at the radar room (uncredited)

20. 

    Guy Standeven

    Naval Officer in Situation Room (uncredited)

Equipo 28