All Cast
Edward Connell
David Fielding (as Skip Shimer)
Barbara Hewitt
Susan Turner
Jack Woods
Asmodeus
Frank Bonner
Jim Hudson (as Frank Boers Jr.)
Robin Christopher
Vicki (as Robin Snider)
James Phillips
Reporter Sloan (as Jim Phillips)
Fritz Leiber Jr.
Dr. Arthur Watermann (as Fritz Leiber)
Patrick Burke
Doctor Branson
Sharon Gray
Nurse
Louis Clayton
Old man in cave
Norvelle Brooks
Irving L. Lichtenstein
James Dwion
The Orderly
Forrest J. Ackerman
Doctor on Tape Recorder (voice) (uncredited)
Jack H. Harris
Detective Harrison (uncredited)
Chuck Niles
Reporter Sloan (voice) (uncredited)