Cast 17

1. Edward Connell

   David Fielding (as Skip Shimer)

2. Barbara Hewitt

   Susan Turner

3. Jack Woods

   Asmodeus

4. 

   Frank Bonner

   Jim Hudson (as Frank Boers Jr.)

5. Robin Christopher

   Vicki (as Robin Snider)

6. James Phillips

   Reporter Sloan (as Jim Phillips)

7. Fritz Leiber Jr.

   Dr. Arthur Watermann (as Fritz Leiber)

8. Patrick Burke

   Doctor Branson

9. Sharon Gray

   Nurse

10. Louis Clayton

    Old man in cave

11. Norvelle Brooks

12. Irving L. Lichtenstein

13. James Dwion

    The Orderly

14. 

    Forrest J. Ackerman

    Doctor on Tape Recorder (voice) (uncredited)

15. Jack H. Harris

    Detective Harrison (uncredited)

16. Chuck Niles

    Reporter Sloan (voice) (uncredited)

17. Jim Duron

    The Green Giant

Crew 17