The Simpsons Season 32 Episode 12 - Diary Queen Episode Title:Diary Queen.Episode Description:Bart and Milhouse discover Mrs. Krabappel's old diary after buying a bunch of books at Ned Flanders's yard sale to attempt a stunt. Discovering a page where Krabappel had written her success of fixing Bart's school life after classes, Bart is suddenly convinced that he's the most improved student. With the help of Maggie, Lisa finds the diary at the treehouse and discovers that Mrs. Krabappel was actually referring to her cat, but only reveals this to Bart after he decides to enter the school's spelling bee. Later in the treehouse, Ned tells Bart that Mrs. Krabappel surely still thought fondly of him, and a thankful Bart returns the diary to him.