Go Young, West Man! is the fifth episode of Season 5.
Having learned that Catman wasted his entire childhood in the TV business, Timmy Turner wishes that Catman could have one last adventure as a kid. Things are going fine at first, until the pair of boys are spotted by Dimmsdale's local truancy officer, Shallowgrave. Timmy must now outrun the wrath of Shallowgrave while also having fun with Catman.
Timmy and Catman are playing croquet when Timmy asks Catman about his childhood. It turns out, Catman did not have much of a childhood because he was a child actor. Catman is saddened he did not have a normal childhood, so Cosmo and Wanda turn him in to a kid. Timmy's parents enjoy Catman's company, but when it's time to go to school, Catman does not want to go. Instead, he takes Timmy to the arcade, where a truant officer named Shallowgrave is looking for them. They get chased around the village by Shallowgrave, and Catman flirts with the girl at the ice cream shop. Finally, Catman and Timmy are cornered at the treehouse. Timmy is about to give himself up when Catman becomes an adult again. Because he is a responsible adult, it was fine for Timmy to skip school with him. Shallowgrave vows to get Timmy before flying off on a rocket. The conflict has been resolved and everything is back to normal, and Catman gets beaten up for flirting with a girl on a motorbike.Then Mr.Turner will send him to the shelter when he got affection on Mrs.Turner.Then he spits Hairball on the camera then the episode ends.