Episode 26 of "Malcolm in the Middle"
s02e10 The Bully

Reese is suddenly the school hero when he joins the wrestling team, but after he gets thrashed by a girl wrestler, he misses that feeling of pride. He decides to give up being the school bully and instead tries to do many misguided good deeds. The school kids are excited to be out from under the reign of Reese, but Malcolm soon learns that not everyone appreciates his sarcastic comments all the time, and now that his brother is no longer there to protect him, everyone wants to beat up Malcolm because he hurt their feelings. Just as Reese is about to join a feel-good cult, the Krelboynes beg him to regain his crown as school bully because lots of little bullies are causing anarchy. Francis, scared of the school tradition of having every hair shaved from his body on his birthday, begs his parents to fly him home, but they can't afford it. Finally, he thinks he has an out when he injures his hand and the nurse takes pity on him and invites him over to her apartment for birthday cake. Lois and Hal, feeling guilty for not being able to fly Francis home, send him a birthday basket of cookies, which reveals to all of Francis's fellow cadets what he's been trying to hide: it's his birthday. Francis ends up going on his hot nurse date with absolutely no hair.