The Purple Monster

Roy Barcroft

Acting

Dr. Cygnus Layton

James Craven

Acting

Craig Foster

Dennis Moore

Acting

Sheila Layton

Linda Stirling

Acting

Hodge Garrett

Bud Geary

Acting

Stewart

Joe Whitehead

Acting

Prof. Crandal

Fred Howard

Acting

Helen

Rosemonde James

Acting

Marcia

Mary Moore

Acting

Emperor of Mars

John Davidson

Acting

Prof. Benjamin

Wheaton Chambers

Acting