Season
- Season 0 1987-04-17
- Season 1 1989-12-17
- Season 2 1990-10-11
- Season 3 1991-09-19
- Season 4 1992-09-24
- Season 5 1993-09-30
- Season 6 1994-09-04
- Season 7 1995-09-17
- Season 8 1996-10-27
- Season 9 1997-09-21
- Season 10 1998-08-23
- Season 11 1999-09-26
- Season 12 2000-11-01
- Season 13 2001-11-06
- Season 14 2002-11-03
- Season 15 2003-11-02
- Season 16 2004-11-07
- Season 17 2005-09-11
- Season 18 2006-09-10
- Season 19 2007-09-23
- Season 20 2008-09-28
- Season 21 2009-09-27
- Season 22 2010-09-26
- Season 23 2011-09-25
- Season 24 2012-09-30
- Season 25 2013-09-29
- Season 26 2014-09-28
- Season 27 2015-09-27
- Season 28 2016-09-25
- Season 29 2017-10-01
- Season 30 2018-09-30
- Season 31 2019-09-29
- Season 32 2020-09-27
- Season 33 2021-09-26
- Season 34 2022-09-25
- Season 35 2023-10-01
- Season 36 2024-09-29
- Season 37 2025-09-28
Season 37 Episode
- Season 21 Homer the Whopper
- Season 21 Bart Gets a 'Z'
- Season 21 The Great Wife Hope
- Season 21 Treehouse of Horror XX
- Season 21 The Devil Wears Nada
- Season 21 Pranks and Greens
- Season 21 Rednecks and Broomsticks
- Season 21 Oh Brother, Where Bart Thou?
- Season 21 Thursdays with Abie
- Season 21 Once Upon a Time in Springfield
- Season 21 Million Dollar Maybe
- Season 21 Boy Meets Curl
- Season 21 The Color Yellow
- Season 21 Postcards from the Wedge
- Season 21 Stealing First Base
- Season 21 The Greatest Story Ever D'ohed
- Season 21 American History X-cellent
- Season 21 Chief of Hearts
- Season 21 The Squirt and the Whale
- Season 21 To Surveil with Love
- Season 21 Moe Letter Blues
- Season 21 The Bob Next Door
- Season 21 Judge Me Tender
The Simpsons - Season 21 Episode 10 Once Upon a Time in Springfield
8.00 22 minutes 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.
