The Simpsons: Season 21
| # | Air Date | Title |
| 1 | Sep 27 2009 |
Homer the WhopperHomer gets the lead in a movie about a superhero who can take on the powers of every superhero in any comic book he touches. To whip Homer into superhero shape, the studio hire… |
| 2 | Oct 04 2009 |
Bart Gets a 'Z'Mrs Krabappel is fired from Springfield Elementary after Bart spikes her coffee, causing her to make a drunken fool of herself. She is replaced by a cool new teacher, Mr. Vaugh… |
| 3 | Oct 11 2009 |
The Great Wife HopeMixed martial arts (MMA) gains popularity in Springfield, and Marge leads a protest against it. The promoter of a local MMA… |
| 4 | Oct 18 2009 |
Treehouse of Horror XXLisa becomes livid with Miss Hoover, and in a series of homages to classic Hitchcock sets out for deadly revenge. Next, Krusty’s latest fast-food sandwich transforms news… |
| 5 | Nov 15 2009 |
The Devil Wears NadaMarge and a group called the “Charity Chicks” pose for a calendar in hopes of raising money for charity, but Marge becomes the talk of the town thanks to her racy p… |
| 6 | Nov 22 2009 |
Pranks and GreensPrincipal Skinner is getting fed up with Bart’s pranks, so he informs Bart that he is not the best prankster after all. A former student named Andy Hamilton is hailed as… |
| 7 | Nov 29 2009 |
Rednecks and BroomsticksAfter getting lost in a game of hide-and-seek, Lisa wanders into the field and discovers three teenage girls who are practising Wiccans. Though she is sceptical of their spells… |
| 8 | Dec 13 2009 |
Oh Brother, Where Bart Thou?One snowy day in Springfield, Lisa informs Bart that she and Maggie share a bond that Bart will never understand because he doesn’t have a brother, so Bart asks Homer for… |
| 9 | Jan 03 2010 |
Thursdays with AbieGrampa is sitting on a bench waiting for his family when a thoughtful-looking man named Marshall Goldman approaches him and asks to hear about his life. Grampa tells Goldman ab… |
| 10 | Jan 10 2010 |
Once Upon a Time in SpringfieldKrusty is approached by two network executives who want to bring on female co-star Princess Penelope to increase the show’s female demographic. The onstage and behind-the… |
| 11 | Jan 31 2010 |
Million Dollar MaybeHomer blows off Marge to buy a lottery ticket and winds up winning the million-dollar jackpot. Fearing how Marge will react if she finds out the reason Homer missed their date,… |
| 12 | Feb 14 2010 |
Boy Meets CurlHomer takes Marge out for a romantic evening of ice skating and hand-holding, but upon entering the rink, they encounter a curling team practising. Marge and Homer take to the… |
| 13 | Feb 21 2010 |
The Color YellowWhen Miss Hoover asks her students to research their family history, Lisa is horrified to discover that most of her ancestors were bad people – a motley crew of horse thieves a… |
| 14 | Mar 14 2010 |
Postcards from the WedgeWhen Bart fails to turn in his homework, Mrs. Krabappel sends a letter home about Bart’s behaviour. Despite Bart’s best efforts to intercept it, Homer reads the let… |
| 15 | Mar 21 2010 |
Stealing First BasePrincipal Skinner announces that Mrs. Krabappel was called out of town and budget cuts dictate that, until she returns, the school’s two fourth grade classes will merge.… |
| 16 | Mar 28 2010 |
The Greatest Story Ever D'ohedWhen Homer is playing noisily in the yard, it disrupts Flanders’ bible-study group. Coaxed by the reverend, a frustrated Flanders takes it upon himself to redeem Homer by… |
| 17 | Apr 11 2010 |
American History X-cellentWhen the police are called to diffuse a rowdy crowd at Mr. Burns’ estate, one of the officers recognizes priceless stolen paintings on the walls, and the maniacal billion… |
| 18 | Apr 18 2010 |
Chief of HeartsHomer is completing his court-ordered community service when he befriends his supervisor, Chief Wiggum, by offering him one of his sandwiches. Touched by the act of kindness, W… |
| 19 | Apr 25 2010 |
The Squirt and the WhaleThe Simpsons decide to embrace a cheaper, alternate source of energy by erecting a wind turbine in their backyard. But when Homer realizes some of the power is being directed t… |
| 20 | May 02 2010 |
To Surveil with LoveA bomb squad mistakenly blows up Homer’s unattended gym bag, releasing radiation into the city and authorities react by suspending civil liberties. Wiggum and his men ins… |
| 21 | May 09 2010 |
Moe Letter BluesAs Mother’s Day approaches, Moe narrates an episode in which he writes a letter to Homer, Apu and Reverend Lovejoy, who are vacationing with their children, and threatens… |
| 22 | May 16 2010 |
The Bob Next DoorBart becomes convinced that his new neighbor, Walt, is his archenemy, Sideshow Bob, disguised and back for revenge. But when Marge tries to convince Bart otherwise by taking hi… |
| 23 | May 23 2010 |
Judge Me TenderWhen Moe discovers a hidden talent for judging contests, he is approached by a television agent to join the AMERICAN IDOL ju… |