Down-on-their-luck racers Larry and Deke steal from a supermarket manager to buy a car that will help them advance their racing chances. Their escape does not go as planned when Larry's one-night stand, Mary, tags along for the ride.
Martians come to Earth to build an H-bomb strong enough to blast Earth out of orbit so that Mars can be moved into its place in closer proximity to the sun. Super-scientist Larry Martin, inventor of the first stratospheric-flight spaceship as well as a jet-powered personal flying suit with helmet, is called upon by the government to investigate ramped-up UFO reports occasioned by the Martians' spaceships. The Martians, meanwhile, led by Marex, engage a renegade earth scientist and a gaggle of gangsters to help them steal supplies, operate a menacing robot, and build their bomb. This movie serial in 12 chapters was originally planned as a sequel to "Radar Men From The Moon" with Commando Cody as the hero but at the last moment the main characters' names were changed and all other references to that serial removed from the script.
A New Mexico cattle man and his strong-willed daughter clash over the man's choice for a new bride. Things get worse when the elder man has his daughter's lover hanged. With the help of an old flame, a gambler, the daughter puts into motion a plan to drive her father from his estate.
