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Se21

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The Simpsons' twenty-first season pulled ahead of "Gunsmoke" as the longest running American primetime television series 1989-2012. It aired on September 27, 2009 and ended on May 23, 2010.

Episodes

Image # Original airdate Prod. Code Title Title Reference
Homerthewhopper 1 - 2101 September 27, 2009 LABF13 "Homer the Whopper" Home of the Whopper
Zacharyvaughn 2 - 2102 October 4, 2009 LABF15 "Bart Gets a "Z"" Bart Gets an "F"
Greatwifehopebanner 3 - 2103 October 11, 2009 LABF16 "The Great Wife Hope" The Great White Hope
Treehouse of Horror 4 - 2104 October 18, 2009 LABF14 "Treehouse of Horror XX" N/A
The Devil Wears Nada 5 - 2105 November 15, 2009 LABF17 "The Devil Wears Nada" The Devil Wears Prada
Simp PranksandGreens v2F 6 - 2106 November 22, 2009 LABF18 "Pranks and Greens" Franks and Beans
Rednecks and Broomsticks 7 - 2107 November 29, 2009 LABF19 "Rednecks and Broomsticks" Bedknobs and Broomsticks
MABF01 8 - 2108 December 13, 2009 MABF01 "O Brother, Where Bart Thou?" O Brother, Where Art Thou
Thursdays with Abie 35 9 - 2109 January 3, 2010 MABF02 "Thursdays with Abie" Tuesdays with Morrie
OnceUponTimeInSpringfield 10 - 2110 January 10, 2010 LABF20 "Once Upon a Time in Springfield" Once Upon a Time in America
Promocold 11 - 2111 January 31, 2010 MABF03 "Million Dollar Maybe" Million Dollar Baby
Boymeetscurl2 12 - 2112 February 14, 2010 MABF05 "Boy Meets Curl" Boy Meets Girl
TheColorYellow 13 - 2113 February 21, 2010 MABF06 "The Color Yellow" The Color Purple
Postcards from the wedge 14 - 2114 March 14, 2010 MABF04 "Postcards from the Wedge" Postcards from the Edge
Stealing First Base 2 15 - 2115 March 21, 2010 MABF07 "Stealing First Base" N/A
The Greatest Story ever D'ohed 16 - 2116 March 28, 2010 MABF10 "The Greatest Story Ever D'ohed" The Greatest Story Ever Told
American History X-cellent 17 - 2117 April 11, 2010 MABF08 "American History X-cellent" American History X
Chief of Hearts 18 - 2118 April 18, 2010 MABF09 "Chief of Hearts" King of Hearts
TheSquirtAndTheWhale 19 - 2119 April 25, 2010 MABF14 "The Squirt and the Whale" The Squid and the Whale
ToSurveilWithLove 20 - 2120 May 2, 2010 MABF12 "To Surveil, with Love" To Sir, with Love
Moeletterblues 21 - 2121 May 9, 2010 MABF13 "Moe Letter Blues" Mo' Better Blues
The Bob Next Door 22 - 2122 May 16, 2010 MABF11 "The Bob Next Door" The Boy Next Door
Judge Me Tender promo 23 - 2123 May 23, 2010 MABF15 "Judge Me Tender" Love Me Tender

Trivia

  • This is the first "full" season to use all episodes in the 16:9 widescreen ratio.
  • This season is also part of the 20th anniversary of "The Simpsons".
  • This is the last season having its episodes produced in the 2000s as the second half of Season 21 would be produced in 2010, marking this also the first season to be produced in the 2010s.
  • This is the first season to have Kevin Michael Richardson in the voice cast, even though he was a guest star in the show at the time before he became an official voice cast member in the 2010s.
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