Maggie attacks Homer with a mallet after seeing it on Itchy & Scratchy. Marge begins a protest outside the production offices, demanding the show be retooled to prevent further violence.

After a series of destructive acts, Homer decides that Santa's Little Helper must go unless he passes obedience school. As the dog's last hours with the family approach, Bart must find a way to get through to him.

Marge rediscovers her interest in art and takes up painting. When Mr. Burns hires her to paint his official portrait, Marge tries but fails to find his "inner beauty."

Flanders suffers a failure after Homer wishes him ill.

Maggie uses one of three wishes; a mind-reading Bart rules Springfield; Homer donates his brain to Mr. Burns' science project.

When Homer helps Bart build a soapbox racer, it does little for the car but a lot for their relationship.

Burns hires Major League ringers for the plant softball championship.

Santa's Little Helper notices resentment after the Simpsons make sacrifices to fund his life-saving operation.

Bart resents Milhouse's new girlfriend; Homer gets the wrong subliminal tape, which has him gaining vocabulary, not losing weight.

After skipping church one Sunday morning, Homer decides to quit church altogether and spend Sundays worshiping in his own way -- with cigars and beer.

Homer and Barney become competitors in the snow-plowing business.

After a DUI, Homer swears off beer for a month. Meanwhile, Bart and Lisa's sibling rivalry plays out in the school science fair.

Overwhelmed by her family's demands during a flu epidemic, Marge accidentally shoplifts at the Kwik-E-Mart and winds up in prison.

Homer takes Nuclear Physics 101 at the local college, where he gets a trio of nerdy tutors expelled for extracurricular activities.

Homer leads a vigilante group to catch the Springfield Cat Burglar, who then robs the museum.

Bart wins an elephant, but Homer won't let him keep it.

Stuck in his room with a broken leg, Bart hears a high-pitched scream. When he looks through his telescope, he sees a guilty Ned Flanders burying the evidence.

Lack of beer and cable TV make Homer a crazed killer; the present is altered by a time-traveling Homer; and Principal Skinner turns detention students into food.

Homer joins the secret society of the Stonecutters and is suddenly exalted when the brethren discover his birthmark. The ancient order is shaken to the core by the ineptitude of its new Chosen One.

A fortuneteller predicts Lisa's engagement and wedding to a fellow student from an upper-crust British family.

Springfield boys try to recapture the town's beloved lemon tree after it's stolen.

Homer tries to gain sixty pounds so he can stay home on disability. When he nearly causes a catastrophe at the plant, Homer reconsiders his plan.

In a scheme to get Krusty's autograph, Bart sends him a check. When Krusty's offshore holding corporation endorses the check, his illegal tax shelter is exposed. In despair after the government auctions off his possessions, Krusty fakes his own death.

Bart and Milhouse wonder if anything interesting happens to the citizens of Springfield, which leads to a series of interconnected vignettes.

Mr. Burns' boorish long-lost son Larry gets the brush-off from Burns, but Homer hatches a plan to reconcile them.

After eating a dish laced with potent peppers during the chili cookoff, Homer has hallucinations where a mystical coyote urges him to find his soulmate.

Lisa has a stellar reputation as a babysitter, but when Homer and Marge leave her in charge of Bart and Maggie, everything starts going wrong.

A hardworking new employee at the power plant is consumed with resentment at Homer's undeserved success.

Designated driver Barney absconds to Manhattan in Homer's car and leaves it there. But when the family journeys to the Big Apple to retrieve their property, Homer discovers his car has been booted.

Homer feuds with the Springfield garbage men and decides to run for Sanitation Commissioner. After winning the election with a sleazy campaign, Homer can’t keep the extravagant promises he made to the town.

After their bank account is drained at a cyber-cafe, the Simpsons go on a disastrous low-budget trip to Japan, where they wind up as contestants on a humiliating game show.

Ned's wife Maude is inadvertently killed by a T-shirt accident at an auto race. Homer and his family try to help Ned cope.

In the twelfth Treehouse of Horror episode:

Hex and the City – While on a day trip through Ethnictown, Homer's bumbling catches the ire of a gypsy, who curses Homer's family and friends into receiving nothing but bad luck.

House of Whacks – in this mixed parody of Demon Seed and 2001: A Space Odyssey, Marge buys an automated house and customizes it with the Pierce Brosnan personality, who falls for Marge and attempts to murder Homer.

Wiz Kids – In this Harry Potter parody, Bart and Lisa go to a school for wizards, and Lord Montemort (Mr. Burns) uses Bart to capture Lisa's magic.

Guest star: Pierce Brosnan and Matthew Perry.[20]

Thinking Homer does not find her attractive anymore, Marge decides to get liposuction, but instead receives breast implants. She becomes adored by many of the men in Springfield, and becomes a spokesmodel for trade shows. Meanwhile, Bart and Milhouse try to imitate a stunt they saw on an episode of Batman that guest stars Krusty the Clown. When the stunt ends badly, media watchdog groups blame Krusty, forcing the clown to make his show more safety-conscious and less fun.

Homer becomes "Pie Man", a masked vigilante who delivers a pie in the face of justice to evildoers. However, after attacking Mr. Burns, Burns hires him as a personal hitman, until Homer is ordered to attack the Dalai Lama.