 They Saved Lisa's Brain

"They Saved Lisa's Brain" is the 10th episode of the 15th season of the animated television series *The Simpsons*. It originally aired on November 30, 2003. In this episode, Lisa becomes frustrated with the ignorance in Springfield and attempts to change the town by organizing a seminar for the local residents. However, things take a turn when she is committed to a mental institution, where she meets various characters from the show.