The latest menace released from the Idol-Head of Diabolu is a creature that can turn people into giants. It releases Malador, an ancient sorcerer who had been shrunken to microscopic size as punishment.; An embittered author discovers that a rival novelist has discovered the secret of time travel, which allows him to write with more historical accuracy. He accidentally kills the man, then steals the secret, goes back in time, and is arrested for a crime his rival previously committed.; A scientist discovers a ray that can steal the intelligence of animals and people. However, when he uses it on an alien invader, it leads to his death.