Season 23

Season 23 was announced in November 11, 2010. It premiered in the September 25, 2011.

Episodes

 * The Falcon and the D'ohman
 * Bart Stops to Smell the Roosevelts
 * Treehouse of Horror XXII
 * Replaceable You
 * The Food Wife
 * The Book Job
 * The Man in the Blue Flannel Pants
 * The Ten-Per-Cent Solution
 * Holidays of Future Passed
 * Politically Inept, with Homer Simpson
 * The D'oh-cial Network
 * Moe Goes from Rags to Riches
 * The Daughter Also Rises
 * At Long Last Leave
 * Exit Through the Kwik-E-Mart
 * How I Wet Your Mother
 * Them, Robot
 * Beware My Cheating Bart
 * A Totally Fun Thing That Bart Will Never Do Again
 * The Spy Who Learned Me
 * Ned 'N Edna's Blend
 * Lisa Goes Gaga

Regarding the show itself

 * When a fan asked why there were no musical numbers in The Simpsons Movie, Jean said that they wound up on the cutting room floor, including a big song about Alaska, with music by The Eurythmics' Dave Stewart. "They got pretty far along in the animation, and then we got scared that the movie began to drag in that section," explained Jean, noting that the song will be included on the next DVD release of the movie.
 * In answering a fan's question, Groening said that it was always his intention to not have the characters on the show age, thanks to the wonders of animation. But, as he quipped, "we may do it when we run out of ideas. That may be the last sad season of The Simpsons. Bart will turn 11."
 * Two more "Banksy-eseque" gags occurred during the season.
 * The 500th episode, titled "At Long Last Leave", aired February 19, 2012.
 * The guest voices this season included Kiefer Sutherland, Jane Lynch, Michael Cera, Andy Garcia, Armie Hammer, Joan Rivers, Jeremy Irons, and Tim Heidecker and Eric Wareheim.
 * Anthony Bourdain had a cameo in "The Food Wife".
 * Bryan Cranston guest starred as Stradivarius Cane in "The Spy Who Learned Me", a suave Hollywood superspy.
 * Although Lisa explored romantic possabilities with Michael Cera's character, "(...)she may ultimately find true love with a certain four-eyed nerd."
 * The show bent its format with an episode that followed the saga of Moe's bar rag over hundreds of years, voiced by Jeremy Irons. ("Moe Goes from Rags to Riches")
 * The family finally visited the last continent they had not yet been to, Antarctica. ("A Totally Fun Thing That Bart Will Never Do Again").
 * In one episode Mr. Burns had an iPad app called Angry Burns.
 * One episode involved an Inception parody where one dream level was drawn in The Tracey Ullman Show style and Dan Castellaneta reverted to his old, Walter Matthau-inspired Homer voice for the segment. ("How I Wet Your Mother")
 * Homer became a Glenn Beck-esque TV pundit and leader of the "Gravy Boat" movement. His preferred presidential candidate is Ted Nugent, who guest-stars. ("Politically Inept, with Homer Simpson")
 * Homer became addicted to Stranded, a show that's based on Lost. The show ended 5 years previously but Homer wouldn't let anyone tell him how it ended.
 * Lady Gaga, whose song Just Dance was heard in the Season 21 episode "Moe Letter Blues" returned as a guest star in "Lisa Goes Gaga".