Avsnitt 23

The rainmaking machine has done its evil work; Simon has shrunk everyone to the size of his thumb, even his henchman Cad. Panic soon grips the city. Underdog and Polly arrive with a plan to capture Simon and make him reverse his formula. Underdog and Polly lead the citizens into the backyard of Simon's lab . Using a leaf, a strand of Polly's hair and a spider's web, our hero swings down and- using his makeshift violin- sends the demented scientist softly to dreamland. While Simon sleeps, Underdog grabs a hold of the shrinking water bottle and pours enough of the solution to shrink Simon to the size of a flea. When Simon wakes up, he tickled by Underdog and Polly until he gives up the antidote . Soon, everyone is back to his or her normal size and Simon and Cad are turned over to the law.