A mad magician conjures up a demon, but a cat unexpectedly interferes with the spell, leaving the demon free to attack the magician and the innocent onlookers.
A scientist correctly predicts atomic war and develops a force field to protect himself. After twenty years he emerges from behind his force field to learn that a serum has been developed to allow people to live for a thousand years but it has no effect on anyone over thirty.
Three men survive being tossed out into the airless vacuum of space and reverse the direction of the rocketship so that it does not convey criminals to Mars.