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.

After destroying Flanders' shrine to The Beatles, Bart and Milhouse are punished by being put in community groups. Bart joins the Pre-Teen Braves along with Ralph Wiggum, Nelson Muntz and Database. Led by Marge, they start engaging in community activities. However, they soon become rivals with The Cavalry Kids, led by Milhouse. The two groups try to outdo each other and become involved in a contest to sell the most candy. The Cavalry Kids win the prize of singing the national anthem at a baseball game. However, the Pre-Teen Braves pretend to be The Cavalry Kids and sing their own version of the national anthem. As the crowd becomes enraged, the real Cavalry Kids arrive and a massive stadium-wide brawl erupts. Marge becomes upset, and the fighting ends when an image of her crying is shown on the JumboTron.

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

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.

Marge goes on a cleaning frenzy before the housekeeper she’s won the services of comes to the house. One spot remains and she mixes a number of toxic cleaners together to tackle the job. The noxious mixture knocks her out and she wakes up suffering from amnesia. Marge is taken home and the family tries to bring back her memory. She starts to get back memories of her children and other insignificant things, but when it comes to remembering her husband, nothing he does seems to jog her memory. When he can’t get her to remember him, he tries to win her all over again, especially after Patty and Selma get her back out on the dating scene.

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."

Lisa struggles to become the proud owner of a Mypod, and Homer believes Bart's new Middle-Eastern friend Bashir is involved in a terrorist plot to destroy the Springfield Mall.

Bart falls in love with a charitable girl named Jenny, prompting Bart to behave in order to date her. Meanwhile, Lisa becomes depressed when she writes a report on Springfield's future.

In order to get back at his dad, Bart goes undercover as a graffiti street artist and plasters Homer's unflattering image all over Springfield. But one night, Bart and Milhouse get caught in the act by established street artists Shepard Fairey, Ron English, Kenny Scharf and Robbie Conal (guest voicing as themselves), and to Bart's surprise, they invite him to exhibit his satirical artwork in his very own gallery show.

Meanwhile, a hip, new health food superstore opens in Springfield that threatens to put Apu and the Kwik-E-Mart out of business.

Homer embarrasses Marge at the movies during a film featuring superspy Stradivarius Cain, and his apologies fall on deaf ears. In an effort to become a better husband, he seeks help from someone he believes to be the real Stradivarius Cain.

Kent Brockman has decided that local news has been a real mistake and a terrible career move for him.

When Marge gets fed up with the thankless duty of chauffeuring her kids around, she begins working as a driver for a transportation app service. Meanwhile, Homer bankrupts Moe when he watches over the bar for one night, which forces Moe to take a temporary job as a janitor at the nuclear plant.