The Man Who Grew Too Much is the thirteenth episode of Season 25.
Synopsis[]
When Lisa protests against genetically-modified foods, she discovers that the town's newest chemical engineering plant is owned by none other than Sideshow Bob, who's using the plant and the position to genetically modify himself in his neverending plot to kill Bart Simpson. Meanwhile, Marge becomes a church volunteer to help horny teenagers become abstinent.
Full Story[]
The episode starts off with a Taco Tuesday in Springfield Elementary. Students rush out of everywhere to get to the tacos. After Lisa finds out that the vegetables in the cafeteria are Genetically Modified Organisms, she organizes a meeting with the town to alert them of this. However, after research she finds out that GMOs are actually good for the world. Meanwhile, Marge tries to talk to a teen-abstinence group with finger puppets and the teens aren't taking it seriously. When a representative of the Monsanto research campus meets Lisa at a fair, she asks her to come to the campus. There, they find that the company's chief scientist is none other than Sideshow Bob.
He assures the Simpsons that he is done with being evil and convinces Lisa that they could talk about fine art together. She plans to visit him and they have a nice talk. At Marge's abstinence courses with the teenagers, she finally makes progress with them, however bottling their urges causes them to become stressed out and destructive. Bob and Lisa visit a museum and after Bob saves Lisa from falling objects, she asks why he's so strong. He admits that he's been changing his DNA and the real reason they are at the museum is so he can steal DNA of the most intelligent people that ever lived. When Bart comes, Bob warns he can be tempted into a murderous rage very easily.
After a couple bothers him for a minute, he does have a rage and goes after Bart and Lisa. He runs after them with his new grasshopper thighs and sonar of a killer-whale. He chases them to a body of water and they beg him to sing before he kills them. So he does but Marge, Homer and the teen-abstinence group come to stop him. When Lisa talks about Walt Whitman, Bob realizes he's become a monster and attempts suicide (also making chicken sounds) by drowning, but then remembers he has gills. He then walks off but not before standing on a underwater rake and hitting him in the face.
