About this "The Simpsons" episode:

The Simpsons -They Saved Lisa's Brain is the 22nd episode of season 10 and number 225 overall in the series.

After a riot occurs at a Springfield contest that promises a luxurious trip to the most disgusting and dimwitted contest participant, Lisa, disgusted at the lack of intelligence, writes a letter that appears in the newspaper. Springfield's branch of Mensa International, consisting of Comic Book Guy, Dr. Hibbert, Principal Skinner, Professor Frink, and Lindsay Naegle, is impressed and invites Lisa to join the group. When the Mensa members lose their gazebo at the park, they go to complain to Mayor Quimby. However, the mayor thinks they are there to confront him about his political corruption so he flees from Springfield. As a result, Lisa and the others are granted power to the city since they are the smartest. The power eventually corrupts them and they are cornered by a mob, only to be saved when Stephen Hawking shows up. Meanwhile, Homer gets erotic photographs of himself taken for Marge, but while she enjoys them a lot, she gets distracted by the interior design Homer did in their basement for the photo shoot and they do not have sex that night.