The Purple Monster
Roy Barcroft
Dr. Cygnus Layton
James Craven
Prof. Benjamin
Wheaton Chambers
Craig Foster
Dennis Moore
Sheila Layton
Linda Stirling
Hodge Garrett
Bud Geary
Stewart
Joe Whitehead
Prof. Crandal
Fred Howard
Helen
Rosemonde James
Marcia
Mary Moore
Emperor of Mars
John Davidson
Director
Spencer Gordon Bennet
Producer
Ronald Davidson
Original Music Composer
Marlin Skiles
Screenplay
Albert DeMond
Barney A. Sarecky
Milton Rosen
Fred C. Brannon
Lynn Perkins
Basil Dickey
Royal K. Cole
Director of Photography
Bud Thackery
Joseph F. Poland
Music
Charles Maxwell
Sound
Ed Borschell