A Martian invader crashes his spaceship conveniently close to the workshop of a scientist who is developing an interplanetary craft. If the extraterrestrial Purple Monster can complete the rocket ship and return to Mars, he will be able to start a full-scale invasion of Earth. Good thing Craig Foster sets out to thwart the Monster's mission!

Genres

Cast

Roy Barcroft

The Purple Monster

Dennis Moore

Craig Foster

Linda Stirling

Sheila Layton

James Craven

Dr. Cyrus Layton

Bud Geary

Hodge Garrett

John Davidson

Emperor of Mars

Emmett Vogan

Saunders

George M. Carleton

Dr. Paul Meredith

Kenne Duncan

Charles Mitchell

Monte Hale

Dr. Harvey