The Monkey Suit

"The Monkey Suit" is the twenty-first episode of season 17.

Plot
Bart decides to spend his last day of summer well. When he and his family go to the museum they cut in front of Flanders. He goes to the evolution exhibit. After visiting the evolution exhibit, Ned Flanders pushes Mayor Quimby to appoint Reverend Lovejoy as a "Morality Czar" in charge of spreading the theory of creationism. Lisa tries to point out that schools cannot teach conflicting theories of man so the town bans one, unfortunately not the one she wanted. Darwin's theories are quickly outlawed and Lisa finds herself and a small band of classmates as the only supporters of the scientific theory. All scientific buildings are destroyed (including a religious science building).

Lisa is later arrested for holding secret evolution classes and is forced to defend her beliefs in front of a judge with the help of a hated New York lawyer while being prosecuted by a beloved southern attorney. In the 11th hour, Marge stumbles across Lisa's copy of Darwin's On the Origin of Species, to which she becomes deeply drawn. After reading it she changes her view and helps her daughter to call Ned Flanders to the stand. She gives Homer a bottle of beer, Homer is ecstatic but becomes increasingly agitated when he can't open it, eventually acting like a monkey. Homer’s antics cause Ned to crack under pressure and call Homer a 'Monkey faced Gorilla' in front of everyone which Lisa's lawyer capitalizes on by forcing Ned to admit that Homer does indeed look like the missing link that the prosecutors were basing their argument and the case falls apart.

In the end Lisa comforts a dejected Ned by saying that she respects his beliefs but that science and religion should stay separate, that she wouldn't want a scientist to teach religion anymore than a priest should teach science. Something which Ned can agree with. After that Todd reveals himself to really to be Nelson in disguise.

In other languages
HABF14 The Monkey Suit