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The twenty-first season of the American animated television series The Simpsons 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.
Season 21 is the twenty-first season of The Simpsons. Because of this season, The Simpsons pulled ahead of "Gunsmoke" as the longest running American primetime television series. It aired on September 27, 2009 and ended on May 23, 2010. This is the first season of The Simpsons since Season 10 to...
Season 21 of The Simpsons aired from September 27, 2009 to May 23, 2010. It was the first season to air entirely in high-definition. In 2009, to celebrate the 20th anniversary of the premiere of The Simpsons, Fox announced a year-long celebration of the show titled "Best. 20 Years. Ever".
S21.E4 ∙ Treehouse of Horror XX. Lisa 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 anchor Kent Brockman into an enraged zombie and twenty-eight days later, cannibal zombies have overrun Springfield.
Streaming, rent, or buy The Simpsons – Season 21: Currently you are able to watch "The Simpsons - Season 21" streaming on Disney Plus or buy it as download on Amazon Video, Google Play Movies, Vudu, Microsoft Store, Apple TV.
Season 21. THE SIMPSONS--The longest-running scripted series in American primetime television history has entered its 21st year and shows no signs of slowing down. A counter-culture cartoon which has become a cultural institution, the Simpsons is a worldwide phenomenon, skewering all who dare to cross its path.
On January 26, 2023, The Simpsons was renewed for seasons 35 and 36. On February 19, 2012, The Simpsons reached its 500th episode in the twenty-third season. It reached its 600th episode on October 16, 2016, in its twenty-eighth season. On March 21, 2021, The Simpsons reached its 700th episode in its thirty-second season.
