Breaking the Fourth wall

Sometimes, characters on The Simpsons break the fourth wall.

Times this has happened

Season 1

• In Bart the General, before the end credits, Bart sits on a table in a library and talks directly to the viewers about the seriousness of war.

Season 4

• In Duffless, Moe says "You'll be back! And you! And you!" before eventually pointing at the camera. It is then revealed that he is actually pointing at Barney Gumble.

Season 5

• In Lady Bouvier's Lover, while the Simpson family, Patty, Selma, and Jacqueline Bouvier are singing the Armour Hot Dogs jingle, Homer is showing a sign to the camera which reads, "PLEASE BUY ARMOUR BRAND HOT DOGS".

Season 6

• In Who Shot Mr. Burns? (Part One), Dr. Hibbert points to the camera and says "I can't solve this mystery. Can you?" before revealing he pointed at Chief Wiggum. This is a joke at the fact it was thought he broke the 4th wall.

Season 7

• In The Day the Violence Died, Roger Meyers, Jr. says that Chief Wiggum is a rip-off of Edward G. Robinson.

Season 8

• In Lisa's Date with Density, Lisa writes "I will not be a snickerpuss" on the chalkboard. She then questions how Bart writes on the chalkboard in the opening.

Season 9

• In Bart Star, Joe Namath talks to the viewers about vapor lock.

Season 10

• In Sunday, Cruddy Sunday, John Madden and Pat Summerall have a "post-episode analysis", where they come to a conclusion that the episode cheated "the loyal fans who put up with so much nonsense from this franchise".

Season 11

• In Guess Who's Coming to Criticize Dinner?, Homer informs the viewers that the show will be back after the commercial break.
• In Saddlesore Galactica, Comic Book Guy wears a t-shirt that proclaims this episode to be the "worst ever".
• In Missionary: Impossible, a Fox pledge-a-thon presented by Betty White interrupts the ending of the episode. When Bart pledges the needed money, he receives a phone call telling him that he has saved the network. He comments that it "wouldn't be the first time".
• In Pygmoelian, Carl Carlson looks directly at the camera and tells the viewers, "You see, that's why I don't talk much", after starting a dialogue which ends up in tears.

Season 12

• In New Kids on the Blecch, 'N Sync talks to the camera about the navy.
• In Trilogy of Error, Mr. Teeny murmurs in monkey language, "This plot made no sense!" to the camera.

Season 13

• At the end of Sweets and Sour Marge, Lenny Leonard looks at the camera and says to the viewers that he found his loose teeth (which he thought they were pearls at first), and that he can still make a necklace out of them.

Season 14

• In Mr. Spritz Goes to Washington, a promo for Joe Millionaire appears on the screen as green text, which Homer picks up and eats, then spits it out.
• In Old Yeller-Belly, Homer remarks to the camera about how the plan to get Santa's Little Helper back is working.

Season 18

• At the end of You Kent Always Say What You Want, after he gets voiced over by Maurice LaMarche's ads for Fox when he tries to tell Lisa something horrible Kent Brockman mentioned about the Fox Network, and after he gets cut off by the 20th Century Fox Television logo and music when he says, "The truth is-", Homer tries to talk to the audience about it one more time by whispering, "Ok. What I was going to say was-", before being comically interrupted by the Gracie Films logo.

Season 19

• In Treehouse of Horror XVIII, Marge talks to the viewers about the episode during the opening sequence.

Season 20

• In Homer and Lisa Exchange Cross Words, while solving crossword puzzles, Lisa thinks of B.A.R.T. and describes it as a San Francisco people mover. Bart then looks at the camera and says, "Speaking of San Francisco people movers..." before the scene cuts to Homer and Julio dancing at the hardcore gay club.
• In Gone Maggie Gone, Lisa asks the viewers, "Well? Did you get it?", before showing that she asked Milhouse that question and not the viewers.
• In Father Knows Worst, Homer tells the viewers that he's a "great dad to both his kids".

Season 22

• In The Ned-liest Catch, during the cliffhanger ending, Homer and Marge remind the viewer to join TheSimpsons.com and vote on whether or not Ned Flanders and Edna Krabappel should stay together (In later airings of the episode, this scene was extended into the end credits).

Season 23

• In The Falcon and the D'ohman, Comic Book Guy, during the cold open, tells the viewers that the result of Nedna will be revealed in the episode. Also, later in the episode, when Ned and Edna are in bed together while Wayne Slater (who was having a nightmare) disturbed a few couples while sleeping, Edna winks at the camera, which also reveals the result of Nedna: "Pro Nedna".
• In Moe Goes from Rags to Riches, Moe's bar rag tells the viewers his life story throughout the episode.

Season 24

• In Moonshine River, before the end credits, the Simpsons tell the viewers about making their own couch gag.
• In Hardly Kirk-ing, while Homer is strangling Bart at the end of the episode, he says that Bart's comment about not wanting to look like him is "not a heart-warming scene to end [the episode] on".

Season 25

• In Four Regrettings and a Funeral, the church marquee refers to Chip Davis as "Springfield's most beloved character that you never saw".

Season 26

• In The Man Who Came to Be Dinner, Kang turns to the camera and says "As if this never happened", referring to the episode being non-canon.

Season 27

• In Treehouse of Horror XXVI, Sideshow Bob breaks the fourth wall by saying that he's spent 24 years (actually 22 years) trying to kill a ten year old child.
• In Simprovised, Homer answered questions from viewers during the live broadcast, and the questions were different in both the East Coast/Central version and the West Coast/Mountain version.

Season 28

• In The Caper Chase, Robert McKee breaks the fourth wall by talking to Homer about the time cut that happened after the introduction to the clones.

The Simpsons Movie

• During the end credits, Tom Hanks appears and asks the audience to leave him be if they see him in real life.
• While the end credits roll, the Simpson family are watching them, revealing that the Simpsons were watching the entire movie, including the pre-movie Itchy & Scratchy cartoon, in the same theater in the same seats.
• During the end credits, before the family leaves the theater, Maggie says "Sequel", which some viewers think is a sign that there will be a sequel to the movie. However, in reality, a plan for a sequel is undetermined.

Music videos

• In "Do the Bartman", Bart tells the viewers about his story of how he invented the Bartman dance moves in the style of rapping.
• In "Deep, Deep Trouble", Bart tells the viewers about his story on how he got in prison after getting in trouble by Homer and Marge.