|"Bart Gets a "Z""
"Bart Gets a "Z"" is the second episode of Season 21. It aired on October 4, 2009.
When Mrs Krabappel confiscates her students' mobile phones, they hatch a plan to get their teacher drunk to get her to "loosen up". When Principal Skinner fires her, she is replaced by a cool new teacher, Zachary Vaughn, who impresses the kids with his love of texting, Facebook and Twitter. Bart has a lingering guilt about getting Edna fired, and tries to help her. With the assistance of a self-help book-slash-DVD, she opens her own muffin store - but she still longs to be a teacher.
Bart and his classmates get their cellphones confiscated by Mrs Krabappel for using them in class. At a meeting in Bart's house, the students realise that Homer is always fun to be around when he's drunk so they decide to get Mrs Krabappel drunk. Each student steals some alcohol from their parents and puts it in Mrs Krabappel's coffee. After Mrs Krabappel gets drunk she makes a scene which results in her getting fired. Bart and Milhouse buy a book called "The Answer". Following the instructions of the book, Bart and Mrs Krabappel build a Muffin store called Edna's Edibles. That's when Bart confesses that he was the one who put alcohol in Mrs Krabappel's coffee. Mrs Krabappel is angry with Bart and leaves and tears the book with the batter mixer.
Meanwhile, at Springfield Elementary, a new teacher called Zachary Vaughn teaches Bart's class and gives everyone their cellphones back, everyone loves him, except Bart. He still misses Mrs Krabappel. Bart was going to put alcohol in Zachary's drink as well but backs out at the last second and decides to tell Principal Skinner instead. While he is confessing he and Skinner hear someone yelling in the hallway. It was Zachary, shouting drunkenly that he hates children. Skinner initially thinks Bart spiked his drink, and states that he thought Bart told him that he didn't spike it, to which Bart confirms again that he didn't, to which Zachary confirms Bart's statement, as he has a tendency to spike his drink. Willie takes him away (muttering that it always happens to the good ones as he does so), although not before Zachary attempts to defame the faculty by claiming that they just want to control the students. And Mrs Krabappel gets her job back, although she does give her revenge to the students for causing her to get fired in the first place by giving them extremely stale muffins.
The episode was watched by an estimated 9.32 million viewers.
The episode was also given a 6.9/10 rating by IGN who stated the episode was "...neither hilarious nor incredibly terrible. It's middle of the road, but has just enough going for it that a fan will enjoy the episode."