Starman faces the threat from a madman who has created a long distance shock machine that can emulate earthquakes, thus spreading panic in the United States, destroying vital defenses and preparing the way for a surprise invasion.; The members of a sports club turn criminal and break into the Bannerman Laboratories, knocking out the night watchman, and who steal the supply of Miraclo from Rex Tyler's area. Hourman must try to clean his name for the robbery as well as face one of the men who gains strength from taking one of the Miraclo pills!; The murder of a man by a voodoo dancer's leopard tail leads the Sandman into a case full of intrigue wherein the dancer is blamed for the murder, but is actually the fall girl for someone bent on revenge.