Martian (Zombies of the Stratosphere)

The Martians of the 1952 Republic serial Zombies of the Stratosphere seek to switch the orbits of Earth and Mars so that Mars is closer to the sun and thus further into the Sol System's habitability zone. They plan to accomplish this with timed explosions (Hydrogen Bombs) on both worlds. While their plan to set off an explosion on Earth is foiled when the bomb is defused the audience is not informed of what became of the detonation meant to take place on Mars.

Technology
Martians travel to Earth in a rocket ship armed with ray guns and possess hydrogen bombs. They have robotic technology and use it to create a robot in the serial.