The origin of the Cheetah, as Priscilla Rich becomes jealous of Wonder Woman and makes a failed attempt to plot her downfall by framing Wonder Woman for robbery.; The origin and first crime of the Mirror Master.; During a tussle with Batman, the Catwoman recovers her memory of her pre-crime days, and then assists Batman in capturing the criminal Mr. X.; The story of Mxyzptlk's first meeting with Superboy, in which he tries several ways to make Superboy look foolish, but fails, and is finally sent back home after his father tells Superboy how to accomplish that.