Commando Cody, 'Sky Marshal of the Universe', works with American scientists Joan Gilbert and Ted Richards in the development of a flying suit and a rocket to the Moon. When the nation's defences are being sabotaged and destroyed, Cody learns that an atomic-gun is being used and that the men on the moon are the culprits.
- Genre: Action, Science Fiction
- Studio: Republic Pictures
- Keyword: moon, extraterrestrial technology, moon landing, scientist, alien invasion, sabotage, rocket ship, movie serial, scientist hero, invasion of earth, evil ruler, rayguns, rocketman flying suit, lunarians, lunar civilization, extraterrestrial humanoids, first man into space
- Cast: George D. Wallace, Aline Towne, Roy Barcroft, William Bakewell, Peter Brocco, Clayton Moore