Batman [Bruce Wayne]; Robin [Dick Grayson]; Bat-Mite (introduction); Tipper Neely (villain, introduction); The Yellow Gloves Gang (villain, introduction for all); The Joker (villain, image only)
Preparing to go off on patrol, Batman and Robin find the Bat-Cave disturbed and meet Bat-Mite, an admirer of Batman's from another dimension. Bat-Mite wants to join Batman and Robin in their fight against crime, but Batman politely convinces Bat-Mite that that won't work. Instead, Bat-Mite tries to make Batman and Robin's exploits a little more entertaining, a little more "fun." In the end, Batman finds a way to make Bat-Mite useful, which lets the imp know it's time to go home.
Roy Raymond; Karen (supporting); Otto Wile (introduction, villain)
A legend warns that if a person swims too deep in the underground sea, he'll turn into a fish. Roy Raymond films the attempts of two citizens to disprove the legend for Impossible but True, but in both cases, a strange underwater cloud covers them. They disappear, and a fish appears in their place. Noticing a whale amongst all other ocean life, Roy decides to give it a try. Though Roy disappears and a fish appears in his place, he has actually gone inside the whale and found the men behind the scam. The legend was a ploy to scare people away from the lake bed, which is covered with treasure.