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.

Lisa competes at a spelling bee and earns the right to compete in the Spell-lympics, becoming the pride of the town. The host of the show George Plimpton, asks her to intentionally lose so that a more popular boy can win. Lisa refuses and continues to compete, but accidentally misspells a word and loses. Meanwhile, Homer tours with a group obsessed with eating Krusty Burger's latest sandwich.

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.

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.

After Bart steals a key from Principal Skinner's office and gets himself into hot water, Marge and Homer send him to a behavior modification camp.

Selma and Patti's home movies make Marge nostalgic for the Barnacle Bay vacations of her youth, so Homer takes the family there, but the area has changed since the Bouviers were little girls.

Bounty hunter Ned is forced to scrap his partnership with Homer when the hapless layabout skips bail, and Marge mistakenly takes a job at an erotic bakery.

Lisa befriends three teenaged Wiccans after getting lost in the woods during a game of hide-and-seek, and must clear her new friends' names when they are accused of cursing the townspeople with their supposed witchcraft. Meanwhile, Homer befriends Cletus after learning that he and his friends make their own moonshine.

The Simpsons family vacation in Israel with Ned Flanders, but Homer does not appreciate any of the culture—until an Israeli tour guide named Jakob shows him around and, in a severe state of dehydration, Homer believes he is the Messiah.

Bart helps nurse an injured pigeon back to health. After Santa's Little Helper eats the bird, Bart has a hard time coping with the loss. Worried that Bart needs some help getting over the loss, Marge and Homer take him to a therapy session with Dr. Thurston, who advises that the only cure for Bart’s blues is to give away the family dog, but when the Simpsons visit the pup’s new home, a shock causes them to rethink their decision.

When Retirement Castle is closed, Marge asks Grampa and two other octogenarians to move in; Nelson befriends Bart after Bart defends him.

When Homer is accused of stealing a million-dollar painting, only a detective from the 1970s can clear his name.