Elenco 18

1. 

   Lloyd Bridges

   Colonel Floyd Graham

2. 

   Osa Massen

   Dr. Lisa Van Horn

3. 

   John Emery

   Dr. Karl Eckstrom

4. 

   Noah Beery Jr.

   Major William Corrigan

5. 

   Hugh O'Brian

   Harry Chamberlain

6. 

   Morris Ankrum

   Dr. Ralph Fleming

7. Patrick Aherne

   Reporter #1

8. 

   Sherry Moreland

   Martian girl

9. John Dutra

   Physician

10. 

    Kathy Marlowe

    Reporter

11. Tom Coleman

    Reporter (uncredited)

12. James Conaty

    Doctor Taking Lisa's Blood Pressure (uncredited)

13. Sam Harris

    Reporter at Press Briefing (uncredited)

14. 

    Judd Holdren

    Reporter #3 (uncredited)

15. 

    Stuart Holmes

    Reporter (uncredited)

16. 

    Barry Norton

    Reporter (uncredited)

17. Cosmo Sardo

    Reporter (uncredited)

18. 

    Bert Stevens

    Reporter (uncredited)

Equipa Técnica 18