Buster Baxter, Cat Saver is the first part of the sixth episode of Arthur season 2. Buster Baxter, Cat Saver aired on October 27, 1997. It aired with "Play it Again, D.W.".
Buster gets a cat down from a tree with his ice cream and his mother publishes a story on it. When people start calling him a hero, he lets it go to his head and he starts acting supercilious (i.e. cutting everyone in line for a new movie, and getting away with it) and retells the story with exaggerated details. Arthur, Francine, and the Brain make a fool out of Buster to humble him, but he ends up saving Arthur and Francine from a runaway piano.