"Lisa the Vegetarian" is the fifth episode of the seventh season of the American animated television series The Simpsons. It originally aired on the Fox network in the United States on October 15, 1995. In the episode, Lisa decides to stop eating meat after bonding with a lamb at a petting zoo. Her schoolmates and family members ridicule her for her beliefs, but with the help of Apu as well as Paul and Linda McCartney, she commits to vegetarianism. Directed by Mark Kirkland, "Lisa the Vegetarian" is the first full-length episode David S. Cohen wrote for The Simpsons. David Mirkin, the showrunner at the time, supported the episode in part because he had just become a vegetarian himself. Former Beatle Paul McCartney and his wife Linda guest star in the episode; their condition for appearing was that Lisa would remain a vegetarian for the rest of the series. The episode makes several references to McCartney's musical career, and his song "Maybe I'm Amazed" plays during the closing credits. In its original broadcast, "Lisa the Vegetarian" was watched by 14.6 million viewers and finished 47th in the ratings for the week of October 9–15, 1995, with a 9.0 Nielsen rating. It was the fourth highest-rated show on the Fox network that week. The episode received acclaim from television critics and it has won two awards, an Environmental Media Award and a Genesis Award, for highlighting environmental and animal issues, respectively. Plot The Simpson family visits a petting zoo, where Lisa is enraptured by a cute lamb. That night, Marge serves lamb chops for dinner. Troubled by the connection between the dish and its living counterpart, Lisa announces that she is now a vegetarian. Bart and Homer mock her relentlessly for her newfound vegetarianism. Reaction at school is no better; when Lisa requests a vegetarian alternative to the cafeteria food, Principal Skinner labels her an "agitator". After her second-grade class is forced to watch a Meat Council propaganda film starring Troy McClure that criticizes vegetarianism, Lisa's classmates tease and shun her. Jealous of Ned Flanders' barbecue, Homer hosts his own, complete with roast pig. Lisa makes gazpacho as an alternative to meat, but Homer's guests ridicule her. After Homer inadvertently flips a burger into her room that lands on her face, Lisa is enraged. To stop the guests from eating the roast, she uses a riding mower to drive away with the