Simpsons Top 100 Countdown

#71 Brother's Little Helper
Season 11, Episode 2 (guide form the Simpsons Archive)

After a day of exceptionally bad behavior at school, Skinner says that Bart will be expelled unless he starts taking drugs to counteract his attention deficit disorder. After initial reluctance, Bart starts taking Focusyn. He is transformed into a good student and manages to stay focused at home and school, avoiding trouble. However, Bart starts to believe he's being monitored from space and seems to go off the deep end. He's taken to the drug place for testing, but breaks out, steals a tank from the nearby army base, and, after driving it through town, uses it to shoot down a Major League Baseball satellite, which it turns out was spying on everybody. Mark McGwire shows up on the scene to distract everyone and recover the reconnaissance information. I thought that part of the beginning, relating to Bart, was overdone, and the whole Mark McGwire appearance was pretty weak, but I was amused in between it all. Memorable moments include Ralph, the bear, the Flanderses' fire safety skit and Skinner's intro, the hamsters, various drug talk, Homer trying to get Bart to take the drugs, time burglar, cut-offs, personal organizer with cheese grater, Bart behaving unusually, and just about everything relating to the tank except the shooting-down the satellite bit.