Category:Season 21

The Simpsons twenty-first season, this season will pull ahead of Gunsmoke as the longest running American primetime television series 1989-2011 . It will air on September 27, 2009.

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Episodes

1. "Homer the Whopper" September 27 2009 - LABF13
2. "Bart Gets a "Z"" October 4 09 - LABF15
3. "The Great Wife Hope" October 11 2009 - LABF16
4. "Treehouse of Horror XX" October 18 2009 - LABF14
5. "The Devil Wears Nada" November 15 2009 - LABF17
6. "Pranks and Greens" November 22 2009 - LABF18
7. "Rednecks and Broomsticks" November 29 2009 - LABF19
8. "O Brother, Where Bart Thou?" December 13 2009 - MABF01
9. "Thursdays with Abie" January 3 2010 - MABF03
10. "Once Upon a Time in Springfield" January 10 2010 - LABF20
11. "Million Dollar Maybe" January 31 2010 - MABF03
12. "Boy Meets Curl" February 14 2010 - MABF05
13. "The Color Yellow" February 21 2010 - MABF06
14. "Postcards From the Wedge" - March 14 2010 - MABF04
15. "Stealing First Base" - March 21 2010 - MABF07
16. "The Greatest Story Ever D’ohed" March 28 2010 - MABF10
17. "American History X-cellent" - April 11 2010 - MABF08
18. "Chief of Hearts" - April 18 2010 - MABF??
    

• ?? "Moe Letter Blues" - MABF??
• ?? "To Surveil With Love" - MABF??
• ?? "The Bob Next Door" - MABF??
• ??"The Squirt and the Whale"-MABF??
• ??"Judge Me Tender"-MABF15
• ??"Moneybart"-MABF18
• ??"Donnie Fatso"-MABF19
• ?? "Camp Flanders"-MABF??

Known Plots & Guest Stars

• Kelsey Grammer will play Sideshow Bob in an episode where he lives next to the Simpsons.