A man happens upon a Martian spy in human form scouting Earth for an invasion but cannot get the authorities to believe him. He tracks down and kills the Martian, revealing that he himself is a Venusian agent in disguise working to protect Earth.; The radiation from atomic bomb tests mutates a common ant, increasing his size and strength a thousand fold, and grants him human-level intellect. Calling himself Grottu, he declares himself king of all insects, and sets about on a plan to conquer the world, starting with Kenya. His efforts are foiled by an adventurer, who succeeds in turning Grotto's ant followers against him, leaving him for dead.; An advanced supercomputer turns Earth into a utopia, but suspicion remains, only to be inflamed when it is found to be building a giant robot. Humanity turns on the computer and destroys the robot, only to find that it was intended to replace the supercomputer, which breaks down, leaving humanity without its intelligence.; An ugly man rejected by society applies for a job in a freak show. It turns out to be a ruse by a race of aliens who are uniformly gorgeous, and so want a man with an ugly face they find fascinating to marry their queen.