S8E17: My Sister, My Sitter

In "Simpsonlar - S8E17: Episode 17," also known as "My Sister, My Sitter," Lisa takes on the responsibility of babysitting Bart and Maggie. Things quickly go south when Bart, determined to undermine Lisa's authority, injures himself trying to prove she can't handle the job. Lisa, panicking about the situation, decides to take Bart to Dr. Hibbert's office without letting her parents know. She hauls an unconscious Bart around town in a wheelbarrow, desperately trying to keep her babysitting gig from turning into a total disaster. Eventually, things spiral out of control, and Lisa ends up at the Springfield Squidport, where she is caught by Chief Wiggum. Marge and Homer return to find their children in various states of disarray and chaos. Despite everything, Lisa's reputation as a capable babysitter somehow survives when Marge praises her efforts.