When Homer gets the family's telephone service cut off for refusing to pay for calls made to Rio de Janeiro, Brazil, Lisa confesses that she was the one who called Rio after sponsoring an orphan who goes missing. She convinces the family to travel to Brazil to look for him. However, once there, they have no luck finding him, and Homer is kidnapped.

Homer and Marge discover that Apu is having an affair with the Squishee delivery lady at the Kwik-E-Mart. They decide to keep Apu's wife Manjula from finding out about it. However, she eventually learns of Apu's affair by watching store security tapes. She throws Apu out of the house and decides to file for divorce, but soon realizes that she misses him.

While faced with community service for abusing an endangered insect, Homer begins assisting an elderly woman named Mrs. Bellamy. One night, Mrs. Bellamy is murdered, and Homer and Marge are accused of committing the crime.

The 13th Treehouse of Horror episode, consisting of three self-contained segments.

Send in the Clones – Homer buys a hammock that can produce clones of himself. He creates numerous clones to help him around the house, but they soon overrun Springfield.

The Fright to Creep and Scare Harms – Lisa petitions the town to get rid of their firearms after discovering the gravestone of a young man named William Bonney who died from gun violence. However, Lisa soon discovers that William Bonney is the real name of Western outlaw Billy the Kid, whose ghost, along with the ghosts of other infamous criminals, takes over the defenseless town.

The Island of Dr. Hibbert – Dr. Hibbert invites the citizens of Springfield to his island resort, where he turns them into animals.

The Simpson family has to find temporary residence while their house is fumigated for termites. When they run out of options, they decide to become contestants on a reality show where families live in the manner that people did in 1895. The family is initially miserable, but slowly adapt to their new life, which causes the show to lose ratings. The producers decide to try to boost viewers by dumping the house in a river and forcing the family to survive in the wilderness. However, the Simpsons find a bunch of rejects from other reality shows and they attack the producers.

Homer hires a private detective to learn more about Lisa. But when Homer refuses to pay the detective's expenses, he frames Lisa for a crime she didn't commit, forcing her and Homer to go on the run.

Marge gets mugged and becomes so traumatized that she develops Agoraphobia. She hides in the basement. Having little else to do, she decides to exercise with a weight set Homer bought from Rainier Wolfcastle's garage sale. She becomes so strong and confident that she is able to leave the basement. She continues working out and decides to start taking steroids so she can enter a bodybuilding competition. One night at Moe's Tavern she loses her temper and starts destroying the bar and fighting all of the patrons. Homer confronts Marge and says he misses the sweet woman that he married. Marge, horrified at what she has done, apologizes and decides to stop working out.

An air traffic route is redirected so that airplanes start flying directly over the Simpsons' house. The noise starts to disrupt their lives and, desperate for a solution, the family turns to their Congressman. However, he dies of a heart attack, so they ask Krusty the Clown to run for Congress so that he can help them. Krusty is successful in his campaign, but finds that his air traffic bill is ignored by the veteran Congressmen. He soon becomes disillusioned with the system, so the Simpsons, with guidance from Walter Mondale, help him out by blackmailing one of his opponents and attaching the bill to a more popular one. The bill passes, and the air traffic is re-routed.

Homer decides to try for a promotion at Springfield Nuclear Power Plant and suggests several ideas to Mr. Burns, all of which are rejected. One night, Homer overhears Burns admit that the plant's real owner is a canary to protect Burns from responsibility for any wrongdoing by the power plant. Homer releases the bird and tells Burns that nuclear inspectors have arrived for a surprise inspection. Burns, desperate to find a scapegoat, names Homer the new owner. As his first act, Homer fires Burns and takes control of the Plant. However, he finds that his work life as a CEO is conflicting with his family life. Homer decides to return to his old job and gives ownership back to Burns.

Homer becomes obsessed with using new gadgets in his car. One day, he becomes distracted and drives off a pier, losing his driver's license. Unable to use a car, Homer starts to learn the joys of walking. Meanwhile, Marge shoulders the burden of Homer's driving duties and becomes stressed out. One day, as Homer sings about the virtues of walking, Marge accidentally runs him over with her car. Later, as Homer recuperates from the accident, he begins to suspect that Marge is trying to hurt him. They fight and go to see a marriage counselor. The counselor advises Homer to perform one completely unselfish gesture to win Marge back. Homer holds a party with all of her friends and a surprised Marge tells Homer that she loves him.

Moe Szyslak becomes lonely and decides to commit suicide by jumping off a bridge. However, he inadvertently saves Maggie Simpson when she is sent flying from the Simpsons' car window and into his arms. He starts playing with Maggie and becomes attached to her, telling her the story of The Godfather. Homer and Marge become upset about how much time Moe is spending with Maggie and forbid him from seeing her again. One night, Maggie wakes up and hears Fat Tony and the Springfield Mafia outside the house and decides to follow them. When Homer and Marge find her missing, they automatically assume that Moe kidnapped her. When Moe is told that Maggie is missing, his request to help find her is granted by Homer. Maggie follows the mobsters to Luigi's restaurant, where Fat Tony's gang gets into a gun battle with a rival family. Homer, Marge and Moe track Maggie down and Moe decides to go inside and save Maggie. After Moe saves Maggie's life, Homer allows the two to spend more time together.

Homer's mother returns, and after being cleared of all charges, is re-imprisoned on a technicality.

In this loose parody of the musical/movie Evita, Lisa is elected Student Body president, but is unaware that the school staff is using her for their own devices and as a scapegoat if something goes wrong.

Homer is humiliated when he appears on the news running from a bear that nearly attacks him at the city dump. After Grampa scolds him, he swears to fight the bear himself.

Krusty discovers that he never had a bar mitzvah as a child. He quits his show to have it as an adult, with the help of his father, Rabbi Krustofski. Meanwhile, Homer hosts a late-night talk show a la "Politically Incorrect with Bill Maher" as a replacement for Krusty's show.

When a group of singles, seniors, childless couples, teens and gays band together to protest having to accommodate families (including paying property taxes used to teach children they do not have) after a riot at a children's concert, Marge takes up the cause for the families, with some help from Bart and Lisa.

Marge writes a romance novel with characters based on Homer and Ned Flanders that becomes a hit. Meanwhile, Homer gets fired from the power plant again and becomes an ambulance driver.

When Maggie does better than Lisa on an IQ test, Lisa becomes upset over no longer being the smart one and tries to lead Maggie astray.

Homer and Marge's bond becomes stronger when they both get drunk on wine, but soon the bond unravels when Homer blames Marge for crashing the car and Marge gets sent to rehab. Meanwhile, Bart and Lisa complain to Randall Curtis (a George Lucas-esque science fiction movie director) about his latest film.

Bart gets sent to juvenile hall after fooling everyone that there was a marriage concerning him. He encounters a dangerous girl there... He flees with Gina, but then the two are caught by Wiggum.

After hearing that Skinner is getting cold feet about their wedding, Edna leaves Skinner at the altar and, after sending back one marriage gift, hooks up with Comic Book Guy. Meanwhile, Homer and Marge have an argument about if their marriage is still solid or not.

After receiving an injection from Dr. Hibbert, Bart becomes temporarily deaf, which makes him impervious to being bullied, until he accidentally moons the American flag during a donkey basketball game, prompting everyone in town to accuse the Simpsons of being unpatriotic under the new "Government Knows Best" Act.

Mr. Burns buys out Springfield's media outlets after a newspaper mistakenly reports his death, and Lisa's homemade newspaper is next on his list.

Ned Flanders' head injury gives him the power to predict others' deaths, Bart and Lisa play detective when a string of Victorian-era prostitutes are murdered by Jack the Ripper, and the Simpsons go on a fantastic voyage inside Mr. Burns' body to save Maggie.

Marge gets her kitchen remodeled and the dishes she makes inside it get rave reviews. The suggestion of Ned Flanders leads her to enter a cooking contest. However, Marge realizes the competition is harder than it seems. Meanwhile, Bart finds Homer's vintage Playdude magazines and decides to adopt the lifestyle he sees within the articles.

Marge meets up with a former high-school pal who is now a famous news anchor, and she wonders if she made the right life choice.

Homer, Grampa, Apu and Flanders travel to Canada to buy sorely needed prescription drugs with fake Canadian health-care cards.

Lisa does what every little sister has dreamed of - she gets a restraining order put on her big brother. Bart is forced to live in the back garden, but soon realises the joy of communing with nature.

Selma has a severe hot flash while giving Mr. Burns his driving test. Dr. Hibbert explains that Selma is experiencing the onset of menopause. Selma, decides she wants a baby rather than grow old alone. Adoption is suggested, but the Springfield orphanage is empty. Lisa suggests adopting a baby girl from China - but when the Chinese government only allows married couples to adopt, Selma writes down Homer's name as her husband.

When Marge starts economising, Homer thinks he's being left out of the family's important financial decisions, so splashes out on an expensive camper van and sets up camp on the driveway.

After Shelbyville accuses Springfield of being hicks, Marge convinces the townspeople to fund a Frank Gehry-designed concert hall, which is then converted to a prison when the concert hall goes bankrupt on opening night. Meanwhile, Bart and Lisa investigate Snowball II's recent weight gain.

Through Professor Frink's future machine, Bart and Lisa see their lives in the year 2013, where Bart steals Lisa's chances at going to an Ivy League school in order to impress a skater girl named Jenda while Homer (now separated from Marge and living in an underwater apartment) fights Krusty the Clown after Marge begins dating him.

The Simpsons' roof springs a leak when the perfect storm hits Springfield. And when Marge asks what type of father can't keep a roof over his family's head, Homer tries to fix things up, but falls through the roof. Sick of being unwanted, Homer befriends a man who works as a roofer. However, no one else can see him and Homer's insistence that the roofer does exist prompts everyone to think he has gone crazy.

When Bart endangers his health by bingeing on vending-machine food, the Simpsons turn their home into a hostel in order to afford sending him to a forced starvation facility.

Lisa agrees to enter a Krusty-sponsored "Li'l Starmaker" competition and panics when another contestant (guest voice Fantasia Barrino) outperforms her.

Homer sees a movie about the end of the world and fears the same thing will happen in real life after seeing a chain of random occurrences (celebrities ["stars"] falling from the sky, raining blood, a man in a realistic devil costume) and doing a complicated math equation that predicts the end will come on May 18th, but when the end does not come, Homer discovers a flaw in the equation and ends up in Heaven where he meets God and learns that God is planning The Rapture.

After the family successfully protest against a stamp museum being built next to their house, a cemetery is built near the Simpson house instead, making the normally unflappable Lisa realize that someone as smart as her can be afraid of something.

Never one to miss the opportunity to make a quick buck, Homer cashes in on Maggie's bout of chicken pox. He decides to host a Pox Party and charges parents to infect their children.

Bart ends up in a coma after attempting to jump from the roof to the swimming pool at Spinster Arms Apartments, while attending a hunting party at Burns Manor, Homer panics and believes the prey is the hunting party, and after losing a Halloween costume contest to Dr Hibbert as Dracula, a real witch puts a spell on the people of Springfield.

When Bart decides to spend a bit of time with Marge, it's not long before he's buying tea sets and singing duets. Has he turned into a mummy's boy?

Homer spearheads the effort to get pro-football to bring a new franchise to Springfield. The football commissioner, on his way to officially award the franchise, stops at the Simpson house where Grandpa (mistaking him for a burglar) attacks him. Springfield loses out and Abe becomes the town’s pariah. After trying and failing assisted suicide, Abe decides to live his life without fear and when the town decides to reuse their football stadium as a bullfighting ring, he volunteers to be the toreador. Ever the activist, granddaughter Lisa protests his new profession.

Lisa's friendship with Fat Tony's son Michael prompts mob boss Tony to invite the Simpsons over for dinner. Michael says he'd rather be a chef than take over the family business, but that's before Tony is shot by a rival mobster.

A child psychiatrist suggests drumming to channel Bart's energy, and the boy proves he's got the beat when he shows some talent on the skins.

Marge reads Homer's carpentry books and becomes very handy at fixing things. Gender bias keeps the townspeople from accepting a female carpenter, so Marge pretends that Homer does the work. Meanwhile, Bart torments Skinner when he learns the principal has an extreme allergy to peanuts.

When Bart ends up the only guest at Nelson's birthday party, the bully decides he's his best friend and goes about protecting Bart in a parody of "Goodfellas." Meanwhile, Homer reads Lisa to sleep and debates on whether to reveal the book's sad ending to her.

Selma and Grampa embark on a May-December romance, and Bart and Lisa get into trouble with deliverymen over cardboard boxes.

Marge goes online for the first time and becomes obsessed with a role-playing game that Bart and many of their neighbors are playing. Meanwhile, Lisa develops her own obsession--for soccer--and Homer becomes a referee.

The Simpsons' pooch, Santa's Little Helper, becomes a police dog.

In a parody of "24," the school's Counter Truancy Unit tries to stop three sixth-graders planning to disrupt the school bake sale with a stink bomb.

The series' 18th Halloween show features three vignettes that parody movies: one that spoofs "Mr. & Mrs. Smith"; one that sends up "E.T."; and one that parodies "Se7en."

Marge opens a gym for real women because she's disenchanted with Springfield's snooty, glitzy L.A. Body Works. Her gym, Shapes: A Gym for Women, is a huge success, launching a chain that makes Marge rich and famous. But Homer fears Marge will leave him for someone more attractive and goes to extreme lengths to try to save his marriage.

When the adjustable rate on the Simpson couple's mortgage resets at more than the pair can afford, they must sell their house. Good Samaritan Ned Flanders buys the house and rents it out to them at an affordable rate. But Homer pushes his luck too far when he takes advantage of Ned's generous landlord duties.

When Marge learns Springfield Elementary is the worst school in the state, she and Homer rent an apartment in the upscale Waverly Hills school district so Bart and Lisa can attend a better school. Meanwhile, Homer moves into the rented Waverly Hills apartment and gets used to the bachelor lifestyle.

The men and boys in Springfield become obsessed with Ultimate Punch Kick and Choke Championships, a violent sport where fighters inflict severe pain on each other. When Marge and her friends stage a protest against the sport, the show's promoter embraces the controversy and challenges Marge to a match, promising to shut down the competition if she wins. She begins to train with rhythmic gymnastics, but her family step in and get her professional martial arts help to give her a real chance at winning.