The Simpsons Season 22, EP5 Lisa Simpson, This Isn’t Your Life

After finding out that Maggie is upset about missing one of the collectable Happy Little Elves, Homer drives the family to a Texxon station. This leads to Homer continually buying gas to try and win the rare Baby Must Have toy. Failing, they end up driving through the district of town where Marge grew up. When visiting her old house, Lisa discovers Marge was a top-grade student. Meanwhile, during a stunt through the poorly-drained school playground, Bart gets the mud all over Nelson. When Nelson goes to punch him, Bart slips and inadvertibly kicks him in the face, leading Bart to become the new school bully.