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.; An alien learns of the goodness in mankind at Christmastime.