All Cast
Roy Barcroft
The Purple Monster
Dennis Moore
Craig Foster
Linda Stirling
Sheila Layton
James Craven
Dr. Cyrus Layton
Bud Geary
Hodge Garrett
Mary Moore
Marcia
John Davidson
Emperor of Mars
Joe Whitehead
Carl Stewart
Emmett Vogan
Saunders
George M. Carleton
Dr. Paul Meredith
Kenne Duncan
Charles Mitchell
Rosemonde James
Helen
