Season 21

The Simpsons' twenty-first season aired on Fox from September 27, 2009 to May 23, 2010. It was the first of two seasons that the show was renewed for by Fox, and also the first season of the show to air entirely in high definition. With this season, The Simpsons established itself as the longest-running American primetime television series surpassing Gunsmoke. The season received mainly positive reviews from critics, with many praising "The Squirt and the Whale", "To Surveil with Love" and "The Bob Next Door". The show moved up 16 positions in the Nielsen ratings from the previous season and received numerous award nominations, winning two - an Emmy Award for Anne Hathaway for her voicing in "Once Upon a Time in Springfield", and an Annie Award for "Treehouse of Horror XX".

Season episodes list 21

S21E01

S21E01 : Homer the Whopper 7.07/10 (aired on 09/27/2009)

Homer gets the lead in a movie about a superhero who can take on the powers of every superhero in…
S21E02

S21E02 : Bart Gets a 'Z' 6.64/10 (aired on 10/04/2009)

Mrs Krabappel is fired from Springfield Elementary after Bart spikes her coffee, causing her to…
S21E03

S21E03 : The Great Wife Hope 6.29/10 (aired on 10/11/2009)

Mixed martial arts (MMA) gains popularity in Springfield, and Marge leads a protest against it. The…
S21E04

S21E04 : Treehouse of Horror XX 7.19/10 (aired on 10/18/2009)

Lisa becomes livid with Miss Hoover, and in a series of homages to classic Hitchcock sets out for…
S21E05

S21E05 : The Devil Wears Nada 6.73/10 (aired on 11/15/2009)

Marge and a group called the "Charity Chicks" pose for a calendar in hopes of raising money for…
S21E06

S21E06 : Pranks and Greens 6.64/10 (aired on 11/22/2009)

Principal Skinner is getting fed up with Bart's pranks, so he informs Bart that he is not the best…
S21E07

S21E07 : Rednecks and Broomsticks 6.83/10 (aired on 11/29/2009)

After getting lost in a game of hide-and-seek, Lisa wanders into the field and discovers three…
S21E08

S21E08 : Oh Brother, Where Bart Thou? 7.09/10 (aired on 12/13/2009)

One snowy day in Springfield, Lisa informs Bart that she and Maggie share a bond that Bart will…
S21E09

S21E09 : Thursdays with Abie 6.74/10 (aired on 01/03/2010)

Grampa is sitting on a bench waiting for his family when a thoughtful-looking man named Marshall…
S21E10

S21E10 : Once Upon a Time in Springfield 6.61/10 (aired on 01/10/2010)

Krusty is approached by two network executives who want to bring on female co-star Princess…
S21E11

S21E11 : Million Dollar Maybe 7.1/10 (aired on 01/31/2010)

Homer blows off Marge to buy a lottery ticket and winds up winning the million-dollar jackpot.…
S21E12

S21E12 : Boy Meets Curl 6.85/10 (aired on 02/14/2010)

Homer takes Marge out for a romantic evening of ice skating and hand-holding, but upon entering the…
S21E13

S21E13 : The Color Yellow 6.55/10 (aired on 02/21/2010)

When Miss Hoover asks her students to research their family history, Lisa is horrified to discover…
S21E14

S21E14 : Postcards from the Wedge 7.02/10 (aired on 03/14/2010)

When Bart fails to turn in his homework, Mrs. Krabappel sends a letter home about Bart's behaviour.…
S21E15

S21E15 : Stealing First Base 7.04/10 (aired on 03/21/2010)

Principal Skinner announces that Mrs. Krabappel was called out of town and budget cuts dictate…
S21E16

S21E16 : The Greatest Story Ever D'ohed 5.82/10 (aired on 03/28/2010)

When Homer is playing noisily in the yard, it disrupts Flanders' bible-study group. Coaxed by the…
S21E17

S21E17 : American History X-cellent 6.68/10 (aired on 04/11/2010)

When the police are called to diffuse a rowdy crowd at Mr. Burns' estate, one of the officers…
S21E18

S21E18 : Chief of Hearts 6.83/10 (aired on 04/18/2010)

Homer is completing his court-ordered community service when he befriends his supervisor, Chief…
S21E19

S21E19 : The Squirt and the Whale 6.83/10 (aired on 04/25/2010)

The Simpsons decide to embrace a cheaper, alternate source of energy by erecting a wind turbine in…
S21E20

S21E20 : To Surveil with Love 7.12/10 (aired on 05/02/2010)

A bomb squad mistakenly blows up Homer's unattended gym bag, releasing radiation into the city and…
S21E21

S21E21 : Moe Letter Blues 6.9/10 (aired on 05/09/2010)

As Mother's Day approaches, Moe narrates an episode in which he writes a letter to Homer, Apu and…
S21E22

S21E22 : The Bob Next Door 7.23/10 (aired on 05/16/2010)

Bart becomes convinced that his new neighbor, Walt, is his archenemy, Sideshow Bob, disguised and…
S21E23

S21E23 : Judge Me Tender 6.55/10 (aired on 05/23/2010)

When Moe discovers a hidden talent for judging contests, he is approached by a television agent to…