Homer Is Not Talking To Lisa

S07E05 - Lisa the Vegetarian

The Simpson family visits a petting zoo, where Lisa is enraptured by a cute lamb. That night, Marge serves lamb chops for dinner, but Lisa is troubled by the connection between the dish and its living counterpart, and announces that she will no longer eat meat. In response, her brother Bart and her father Homer mock her relentlessly. Reaction at school is no better; when Lisa requests a vegetarian alternative to the cafeteria food, Principal Skinner labels her an "agitator". The students are then forced to watch a Meat Council propaganda film, starring Troy McClure, which criticizes vegetarianism. Lisa is unimpressed by the film, but her classmates tease and shun her.

Homer and Bart continue to give Lisa a hard time at home, particularly since Homer is ready to host a barbecue, complete with roast pig. On the day of the barbecue, Lisa makes gazpacho for all the guests as an alternative to meat, but the partygoers laugh in her face. Enraged and deeply hurt, she climbs aboard a riding mower and drives away with the roast pig in tow. Homer and Bart chase her, but she pushes the pig off a slope and they are too late. The pig rolls through bushes, into a river, and is shot into the air by a dam spillway's suction.

At home, Homer scolds Lisa for ruining his party, and she rebukes him for serving a meat-based dish. They fight and she leaves the house. Lisa soon decides that she can no longer fight the pressure to eat meat, prompting her to grab a hot dog from the grill at the Kwik-E-Mart and take a bite. However, Apu, himself a vegan, reveals that she has eaten a tofu dog. Apu takes Lisa through a secret passageway to the Kwik-E-Mart roof, where they meet Paul and Linda McCartney. Being vegetarians, the McCartneys explain that they are old friends of Apu from Paul's days in India, and discuss their interest in animal rights. After a brief discussion, Lisa is committed once more to vegetarianism, but she realizes that she should tolerate those who disagree with her views. Inspired, Lisa begins to return home and finds Homer frantically searching for her. She apologizes to Homer, admitting she had no right to ruin his barbecue; he forgives her and offers her a "veggie back" ride home.

Source: Wikipedia