Season 21 of The Simpsons is currently available in United States across 7 streaming offer(s).

The Simpsons – Season 21 (2009)

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TMDB6.5
23 episodes
22m

The Simpsons - Season 21 represents a significant milestone in television history, marking the point where the series surpassed Gunsmoke to become the longest-running primetime scripted program in the United States. Premiering on September...

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Synopsis

The Simpsons – Season 21 represents a significant milestone in television history, marking the point where the series surpassed Gunsmoke to become the longest-running primetime scripted program in the United States. Premiering on September 27, 2009, on Fox, the season consists of 23 episodes that reflect the shifting cultural and technological landscape of the late 2000s. The production team, led by executive producer Al Jean, utilized this season to transition more fully into the 16:9 high-definition format, allowing for expanded visual storytelling and more intricate background details in the town of Springfield.

The season opens with Homer the Whopper, an episode written by Seth Rogen and Evan Goldberg, which serves as a clinical deconstruction of the burgeoning superhero film industry. Throughout the 23-episode run, the narrative explores the family’s adaptation to modern societal pressures, including the rise of Mixed Martial Arts, the persistence of reality television, and the complexities of international diplomacy during a trip to Jerusalem. This season also contains the 450th episode, which examines the commercialization of children’s programming through a guest performance by Anne Hathaway.

Why You Should Watch The Simpsons – Season 21

This season provides a distinct historical record of the 2009-2010 television season, balancing the series’ established satirical formula with contemporary social critiques. The transition to High Definition is not merely a cosmetic change; it enables the animators to incorporate a higher density of visual gags and environmental storytelling. The inclusion of outside writing talent like Seth Rogen brings a self-aware, meta-commentary style to the early episodes, specifically targeting the mechanics of Hollywood production cycles and the physical transformation of actors for blockbuster roles.

The Deconstruction of Superhero Media

In the episode Homer the Whopper, the writers analyze the commodification of the human body for corporate entertainment. Homer Simpson is cast as the lead in Everyman, a film based on a comic book character who absorbs the powers of other heroes. The narrative follows Homer‘s struggle with Lyle McCarthy, a celebrity fitness trainer voiced by Seth Rogen, highlighting the tension between natural physical limitations and the artificial standards of the film industry.

This arc provides a cold look at the unsustainable nature of celebrity fitness regimes. The plot concludes with a critique of post-production interference, where the final film is heavily edited, resulting in a product that alienates its core audience. This serves as an early observation of the production difficulties that would eventually become common in the superhero genre throughout the following decade.

Social Satire and Modern Combat Sports

The episode The Great Wife Hope investigates the mainstream acceptance of Ultimate Punching, a parody of Mixed Martial Arts (MMA). Marge Simpson leads a protest against the sport’s violence, leading to a confrontation with the league’s promoter, Chet Englebrit. The episode examines the hypocrisy of community standards, where the townspeople readily embrace violence under the guise of sportsmanship while ignoring the underlying physical risks.

The conflict reaches its peak when Marge is forced to enter the octagon herself. Her motivation is driven by a desire to protect her son, Bart Simpson, from the influence of combat sports, yet she must utilize that very violence to achieve her goal. This paradox highlights Marge‘s pragmatic approach to moral leadership, demonstrating that her non-violent principles are subject to compromise when familial stability is at stake.

International Relations and Religious Tourism

In The Greatest Story Ever Dofed, the Simpson family travels to Jerusalem as part of a tour group led by Ned Flanders. The narrative focuses on the commercialization of religious heritage sites and the psychological phenomenon known as Jerusalem Syndrome. Homer‘s delusions of grandeur, where he believes himself to be a messianic figure intended to unite different faiths, serve as a satire of the simplified view of complex geopolitical and religious conflicts.

The appearance of Sacha Baron Cohen as Jakob, a frustrated Israeli tour guide, provides a cynical counterpoint to the family’s tourism. The writing explores the friction between the sacred nature of the location and the mundane realities of the tourism industry. By centering the conflict on Homer‘s ego, the episode avoids taking a definitive political stance, instead critiquing the superficiality with which Western tourists often engage with ancient cultures.

Technical Milestones and Visual Evolution

Season 21 represents the technical maturity of the 16:9 widescreen format within the series. Under the direction of Al Jean, the production team redesigned the opening sequence to take advantage of the wider frame. This new intro includes numerous references to past episodes and background characters, rewarding long-term viewers with a high level of visual density that was not possible in the 4:3 standard definition era.

The Treehouse of Horror XX installment further showcases this technical evolution. Each segment utilizes a different visual style, such as the black-and-white aesthetic used for the Alfred Hitchcock parody, Dial M for Murder or Press # to Return to Main Menu. The use of atmospheric lighting and more sophisticated camera angles in these segments demonstrates the animators’ ability to pivot into genre-specific visual languages, separating the annual special from the standard aesthetic of the series.

Character Arc Analysis and Psychological Depth

Bart Simpson‘s character arc in O Brother, Where Bart Thou? reveals a rare moment of vulnerability and psychological need. Lacking a brother to share his experiences, Bart attempts to mentor a younger child named Charlie. The episode explores the concept of the surrogate sibling and the frustration Bart feels when he cannot control the behavior of others, mirroring his own father’s frequent struggles with authority.

Lisa Simpson experiences a similar search for belonging in Rednecks and Broomsticks. After befriending three girls who claim to practice Wicca, Lisa faces the skepticism of the town’s religious and legal authorities. Her arc focuses on the conflict between intellectual curiosity and the rigid social structures of Springfield. The narrative demonstrates her continued isolation as an academic overachiever in a community that often views non-traditional belief systems with suspicion.

Official Age Rating Guide

Official Rating: TV-PG. Official Reason: Animated violence, suggestive themes, and infrequent coarse language.

Is The Simpsons – Season 21 Safe to Watch? (Age Rating Guide)

Official age rating not available.

Browse more curated picks in The Simpsons and TV Shows.

For verified credits, release details, or official resources, visit IMDb and Official Site.

Director Not available
Main Cast Dan Castellaneta, Julie Kavner, Nancy Cartwright, Yeardley Smith, Hank Azaria
Release Year 2009
Genre Animation, Comedy, Family

Frequently Asked Questions

When was The Simpsons – Season 21 released?

The Simpsons – Season 21 was released on September 27, 2009.

What is The Simpsons – Season 21 about?

The Simpsons – Season 21 represents a significant milestone in television history, marking the point where the series surpassed Gunsmoke to become the longest-running primetime scripted program in the United States.

Where can I watch The Simpsons – Season 21?

The Simpsons – Season 21 is available on Amazon Video, Apple TV, and Disney+.

Episode guide

Homer the Whopper
Episode 1 September 27, 2009 22m

Homer the Whopper

Homer 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 hires a celebrity fitness trainer.

Bart Gets a 'Z'
Episode 2 October 4, 2009 23m

Bart Gets a 'Z'

The fourth grade students of Springfield Elementary School decide to spike Ms. Krabappel's coffee in order to teach her a lesson after she takes away their cell phones. She is fired by Principal Skinner, who hires a new teacher named Zachary Vaughn. Although Vaughn is a hip young teacher who impresses the students, Bart is plagued by guilt and tries to get Ms. Krabappel hired back.

The Great Wife Hope
Episode 3 October 11, 2009 22m

The Great Wife Hope

The men and boys in Springfield become obsessed with Ultimate Punch Kick and Choke Championships, a violent sport where fighters inflict severe pain on each other. When Marge and her friends stage a protest against the sport, the show's promoter embraces the controversy and challenges Marge to a match, promising to shut down the competition if she wins. She begins to train with rhythmic gymnastics, but her family step in and get her professional martial arts help to give her a real chance at winning.

Treehouse of Horror XX
Episode 4 October 18, 2009 23m

Treehouse of Horror XX

Dial "M" for Murder or Press "#" to Return to Main Menu- Lisa is forced into a Hitchcockian murder scheme by Bart. Don't Have a Cow, Mankind- Springfield is once again overrun by zombies, thanks to Krusty Burger's latest sandwich. There's No Business Like Moe Business- In a Sweeney Todd spoof, Moe bleeds Homer dry to create the perfect microbrewed great beer.

The Devil Wears Nada
Episode 5 November 15, 2009 23m

The Devil Wears Nada

Marge 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 poses. Meanwhile, Carl is chosen as the newest supervisor at the nuclear power plant, and hires Homer to be his personal assistant.

Pranks and Greens
Episode 6 November 22, 2009 22m

Pranks and Greens

Principal 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 the best prankster, and Bart sets out on a mission to track Andy down. However, when Bart finds out that Andy is a 19-year-old still in his pranking days, they become fast friends.

Rednecks and Broomsticks
Episode 7 November 29, 2009 22m

Rednecks and Broomsticks

Lisa befriends three teenaged Wiccans after getting lost in the woods during a game of hide-and-seek, and must clear her new friends' names when they are accused of cursing the townspeople with their supposed witchcraft. Meanwhile, Homer befriends Cletus after learning that he and his friends make their own moonshine.

Oh Brother, Where Bart Thou?
Episode 8 December 13, 2009 23m

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 a baby brother. When Homer denies Bart's request, Bart makes his way to the Springfield Orphanage to find what he thinks he's missing.

Thursdays with Abie
Episode 9 January 3, 2010 23m

Thursdays with Abie

Grampa 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 about the time he was on a World War II battleship, which was hit by an enemy torpedo, and Goldman, a human-interest columnist, publishes it in The Springfield Shopper. Later, Grampa meets Mitch Albom and shares another story with Goldman for a follow-up article. Homer becomes jealous of Grampa's newfound fame and seeks a surrogate father. But when Homer discovers a draft of Goldman's third story, he must race to find Grampa before it is published and his life is changed forever.

Once Upon a Time in Springfield
Episode 10 January 10, 2010 22m

Once Upon a Time in Springfield

Krusty grudgingly adds a pretty, singing cohost named Princess Penelope to his show in order to attract more female viewers. Girls love her, and ratings improve, but Bart and Milhouse want to get the show back to the way it was. The situation gets more complicated when Krusty and Penelope fall in love and decide to get married. Meanwhile, Homer, Lenny, and Carl consider working at a competing nuclear plant when Mr. Burns cuts off their daily doughnut service.

Million Dollar Maybe
Episode 11 January 31, 2010 23m

Million Dollar Maybe

Homer 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, Homer keeps his newly inherited fortune a secret and spoils his family with “anonymous” gifts. When Bart finds out, he and Homer spend the money like it’s going out of style, including buying front-row to tickets to see Coldplay in concert.

Boy Meets Curl
Episode 12 February 14, 2010 23m

Boy Meets Curl

Homer 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 ice and discover their love for the sport, and soon after, join the curling team and compete with them in the Olympic trials. Team Springfield claims the win and moves on to the 2010 Vancouver Games where Bob Costas covers the action. Meanwhile, sleazy vendors introduce Lisa to the world of collecting Olympic pins, and before long, Lisa is hopelessly addicted.

The Color Yellow
Episode 13 February 21, 2010 23m

The Color Yellow

When 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 and deadbeats. But while rummaging through the attic, Lisa happens upon a diary kept by her ancestor, Eliza Simpson. As Eliza’s story unfolds, Lisa learns that her family was part of the Underground Railroad, a group that helped slaves escape to freedom. Eliza recounts liberating a slave named Virgil, but when Lisa presents her findings at school, some of her classmates refute it, leaving Lisa determined to exonerate her family’s name.

Postcards from the Wedge
Episode 14 March 14, 2010 23m

Postcards from the Wedge

When 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 letter, and he and Marge visit Principal Skinner for a parent-teacher conference. Furious, Homer punishes him, but Marge takes a more sympathetic approach. When Bart realizes he can pit Homer and Marge against each other to his benefit, his scheming reaches new heights.

Stealing First Base
Episode 15 March 21, 2010 22m

Stealing First Base

Principal 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. Bart reluctantly shares a desk with Nikki and develops a flirtatious rapport. Bart talks to Grampa about his new crush, and at Grampa's suggestion, gives Nikki a kiss. But when Nikki starts sending Bart mixed signals, he swears off women forever. Meanwhile, Lisa's classmates ostracize her for being an overachiever, and First Lady Michelle Obama, a self-professed nerd, comes to Lisa's defence.

The Greatest Story Ever D'ohed
Episode 16 March 28, 2010 23m

The Greatest Story Ever D'ohed

The Simpsons family vacation in Israel with Ned Flanders, but Homer does not appreciate any of the culture—until an Israeli tour guide named Jakob shows him around and, in a severe state of dehydration, Homer believes he is the Messiah.

American History X-cellent
Episode 17 April 11, 2010 22m

American History X-cellent

When 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 billionaire is taken downtown for questioning. With Mr. Burns gone, Smithers takes charge of the power plant. But when employees take advantage of his good nature, he exacts revenge by forcing the employees to work night and day. These unfair working conditions prompt Homer and his crew to devise a plan to bust out Mr. Burns.

Chief of Hearts
Episode 18 April 18, 2010 22m

Chief of Hearts

Homer 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, Wiggum assigns the other convicts unpleasant tasks, but allows Homer to join him at the picnic table. They continue to grow close, but when the Chief gets injured during a botched bank robbery, Homer doesn't come through when Wiggum needs him the most. Meanwhile, Bart becomes addicted to Battle Ball, a Japanese game made up of plastic balls and magnetic cards, and his family and teachers try to help him kick the habit.

The Squirt and the Whale
Episode 19 April 25, 2010 22m

The Squirt and the Whale

The 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 to the local electric company, he decides to remove his home from the grid and becomes completely dependent upon an unreliable source of power. Meanwhile, a storm erupts, trapping a magnificent 150-foot-long blue whale ashore, and Lisa and Homer attempt to help the poor creature.

To Surveil with Love
Episode 20 May 2, 2010 22m

To Surveil with Love

A 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 install surveillance cameras around Springfield and round up suspected terrorists, including groundskeeper Willie, but when monitoring the nonstop flow of video imagery proves to be too much, Wiggum enlists concerned citizens to help keep the city safe. Meanwhile, Lisa becomes fed up with being blonde, so she dyes her hair a dark color.

Moe Letter Blues
Episode 21 May 9, 2010 22m

Moe Letter Blues

As 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 to run away with one of their wives. While the trio tries to determine whose wife Moe is referring to, Homer, Lovejoy and Apu flashback to the intimate moments they initially ignored between Moe and Marge, Manjula and Helen Lovejoy. But when the boys return from their trip, they're in for the surprise of their lives.

The Bob Next Door
Episode 22 May 16, 2010 22m

The Bob Next Door

Bart 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 him to visit the state penitentiary, a disturbing truth is revealed.

Judge Me Tender
Episode 23 May 23, 2010 22m

Judge Me Tender

When Moe discovers a hidden talent for judging contests, he is approached by a television agent to join the AMERICAN IDOL judges' panel. Moe flies to Los Angeles where he tours the Fox lot and receives some sage career advice. Meanwhile, Homer drives Marge crazy when he begins hanging around the house.

Videos: Trailers, Teasers, Featurettes

Cast

Dan Castellaneta

Dan Castellaneta

Homer Simpson / Abe Simpson / Barney Gumble / Krusty (voice)

Julie Kavner

Julie Kavner

Marge Simpson / Patty Bouvier / Selma Bouvier (voice)

Nancy Cartwright

Nancy Cartwright

Bart Simpson / Nelson Muntz / Ralph Wiggum (voice)

Yeardley Smith

Yeardley Smith

Lisa Simpson (voice)

Hank Azaria

Hank Azaria

Moe Szyslak / Chief Wiggum / Apu / Comic Book Guy / Carl (voice)

Harry Shearer

Harry Shearer

Ned Flanders / Mr. Burns / Smithers / Skinner / Lenny (voice)

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