Zombies of the Stratosphere

In this 12-chapter serial, Martians led by Marex come to Earth to build an H-bomb powerful enough to blast the planet out of orbit, allowing Mars to move closer to the sun. The government calls on super-scientist Larry Martin, inventor of the first stratospheric spaceship and a jet-powered flying suit, to investigate the surge in UFO reports caused by Martian ships. The invaders enlist a renegade Earth scientist and a group of gangsters to steal supplies, operate a menacing robot, and construct the bomb. Originally planned as a sequel to Radar Men from the Moon with Commando Cody as the hero, the project changed the main characters' names and removed all references to that serial.