Tell Tale Heart

S06E02 - Lisa's Rival

Lisa feels her status as top student in the class is threatened when a new student named Allison arrives at Springfield Elementary. Lisa tries to befriend her since the two share many traits, but Lisa feels that Alison is better than her at the things she takes pride in and begins to doubt herself. At a band practice, the two girls end up in a saxophone duel that results in Lisa passing out from over-exertion. Their rivalry comes to a head during Springfield Elementary's annual diorama building competition. Allison constructs a scene from "The Tell-Tale Heart", by Edgar Allan Poe. Lisa goes to great efforts to produce a better diorama, a scene from Oliver Twist, but it is immediately destroyed by an electric fan that Lisa utilizes. Bart decides to intervene and help Lisa sabotage Allison's entry so she can win. On the day of the diorama contest, he distracts the other students with his own demonstrations to give Lisa time to switch Allison's entry with one containing a cow's heart. After Principal Skinner chases Bart away, he discovers the cow's heart in the diorama and proceeds to humiliate Allison in front of the students. Soon Lisa's conscience intervenes and she produces the real diorama.

However, Principal Skinner is unimpressed by both Lisa and Allison's work and declares Ralph's collection of Star Wars figurines to be the winner. In the end, Lisa and Allison put aside their differences and become friends as they walk off into the sunset, picking up Ralph along the way after he accidentally trips and breaks his action figures.

The episode's subplot follows Homer after he encounters and then steals hundreds of pounds of sugar he finds at the site of Moleman's truck accident. Homer decides he can get rich by selling the sugar door-to-door. He keeps the sugar in a pile in his back yard, where he obsessively guards it from thieves. Soon, the sugar attracts bees from a local apiary. The beekeepers track the swarm down and offer to buy the bees back from Homer for $2,000. However, before the transaction can be completed, it begins to rain, dissolving the sugar; the bees fly away, leaving Homer without any money or sugar.

Source: Wikipedia