Season Twenty-One of The Simpsons premiered on September 27, 2009.
Episodes
| # |
#
|
Title
|
|
|
Airdate
|
|
|
|
| 442 |
1
|
Homer the Whopper
|
|
|
September 27, 2009
|
|
|
|
| 443 |
2
|
Bart Gets a 'Z
|
|
|
October 4, 2009
|
|
|
|
| 444 |
3
|
The Great Wife Hope
|
|
|
October 11, 2009
|
|
|
|
| 445 |
4
|
Treehouse of Horror XX
|
|
|
October 18, 2009
|
|
|
|
| 446 |
5
|
The Devil Wears Nada
|
|
|
November 15, 2009
|
|
|
|
| 447 |
6
|
Pranks and Greens
|
|
|
November 22, 2009
|
|
|
|
| 448 |
7
|
Rednecks and Broomsticks
|
|
|
November 29, 2009
|
|
|
|
| 449 |
8
|
O Brother, Where Bart Thou
|
|
|
December 13, 2009
|
|
|
|
| 450 |
9
|
Thursdays With Abie
|
|
|
January 3, 2010
|
|
|
|
| 451 |
10
|
Once Upon a Time in Springfield
|
|
|
January 10, 2010
|
|
|
|
| SP |
SP
|
The Simpsons 20th Anniversary Special: In 3-D! On Ice!
|
|
|
January 10, 2010
|
|
|
|
| 452 |
11
|
Million Dollar Maybe
|
|
|
January 31, 2010
|
|
|
|
| 453 |
12
|
Boy Meets Curl
|
|
|
February 14, 2010
|
|
|
|
| 454 |
13
|
The Color Yellow
|
|
|
February 21, 2010
|
|
|
|
| 455 |
14
|
Postcards From the Wedge
|
|
|
March 14, 2010
|
|
|
|
| 456 |
15
|
Stealing First Base
|
|
|
March 21, 2010
|
|
|
|
| 457 |
16
|
The Greatest Story Ever D'ohed
|
|
|
March 28, 2010
|
|
|
|
| 458 |
17
|
American History X-cellent
|
|
|
April 11, 2010
|
|
|
|
| 459 |
18
|
Chief of Hearts
|
|
|
April 18, 2010
|
|
|
|
| 460 |
19
|
The Squirt and the Whale
|
|
|
April 25, 2010
|
|
|
|
| 461 |
20
|
To Surveil With Love
|
|
|
May 2, 2010
|
|
|
|
| 462 |
21
|
Moe Letter Blues
|
|
|
May 9, 2010
|
|
|
|
| 463 |
22
|
The Bob Next Door
|
|
|
May 16, 2010
|
|
|
|
| 464 |
23
|
Judge Me Tender
|
|
|
May 23, 2010
|
|
|
|