In the episode, Homer buys a magic hammock that can create duplicates of anyone who lies in it in "Send in the Clones"; Lisa's call to end gun violence resurrects undead outlaws in "The Fright to Creep and Scare Harms"; and Dr. Hibbert invites everyone in Springfield to his island resort where everyone is turned into half-man, half-animal hybrids in "The Island of Dr. Hibbert".

She asks if they're ready for tales that will shatter spines and boil blood, to which Lisa replies as "well, duh."

He bundles the clones in a truck and takes them to an isolated cornfield, where he abandons them (killing any who knew the way back), along with the hammock.

In an attempt to stop the clones from overpopulating America, the government tricks them into falling off a cliff at Springfield Gorge[note 1] by trailing giant donuts from helicopters as bait.

While at the Springfield Cemetery mourning the loss of her pet goldfish, Lisa inadvertently discovers the grave of William H. Bonney, a man who was killed in his youth by gun violence.

A futuristic Homer suddenly appears to warn them about guns that have destroyed Earth in the future, only to be shot by Moe, who is fed up with all the contradictory messages.

Homer treks across the island looking for a cure to Marge's condition, but encounters Ned Flanders, who is now a cow-human hybrid in need of a milking.

Homer, initially appalled at what everyone has become, eventually embraces the concept of being a mutant animal upon realizing how well it fits in with his personal lifestyle.

The episode concludes with an appearance by Kang and Kodos, observing that Hibbert's skull-shaped island resembles their alien number 4.

[1] According to Al Jean, in the dub for the scene where Homer is being cloned, Matt Groening said "let's just throw a couple screams in there", and sound archive locator Norm supplied them.

[1] The scene where the Homer clones fall into the gorge was supposed to be a reference to a similar event in the season two episode "Bart the Daredevil", but the idea was dropped due to time constraints.

[4] Kang and Kodos were not originally in this episode, but they were later added in to keep with the tradition of including them, whether a whole segment or a small cameo devoted to them.

[4] The segment titles are based on the 1973 song "Send in the Clowns", the right to keep and bear arms, and H. G. Wells's 1896 novel The Island of Doctor Moreau.

Club notes, "The episode begins with an attempt to summon the spirit of Maude Flanders, who was bumped off in [a] previous season's highly publicized 'Alone Again, Natura-Diddily'.

There was originally going to be a second joke involving Family Guy, but as the show had recently been cancelled, the staff of The Simpsons didn't want to "kick 'em when they're down", so they cut it.

[4] Family Guy would turn the tables during the opening of their episode "PTV", where Homer makes an appearance similar to The Simpsons intro sequence.

During the war room scene when the general displays how fast the clones spread throughout the country, icons of Homer initially begin sprouting up at real Springfield locations.

Billy the Kid, Jesse James, and Kaiser Wilhelm II appear as the zombies in the segment "The Fright To Creep And Scare Harms".