|Treehouse of Horror XXIV||
- The zombie invasion of Springfield could be any zombie work, but it's most likely a reference to Night of the Living Dead.
- The background fight between a giant robot and a giant monster is a reference to Pacific Rim.
- Lard Lad being zapped by lightning and coming to life is a reference to Treehouse of Horror VI.
- The giant Wiggum-Cyclops is based on the Cyclops from The 7th Voyage of Sinbad.
- Alfred Hitchcock's cameo, and the crows perched all over a climbing frame before attacking Krabappel, reference Hitchcock's film of The Birds.
- Bart and Stephen King writing "All work and no play makes Jack a dull boy" is a reference to Stanley Kubrick's version of The Shining. The first segment of Treehouse of Horror V is a homage to The Shining.
- Groundskeeper Willie's appearance is a reference to Wikipedia:Hellboy, while his fight with Kroenen is a reference to the film.
- Homer's mutated appearance is a reference to Blade II and the monstrous Reapers, while Carl's costume references Blade himself.
- Corpses of the 'Tracey Ullman Show' versions of the Simpsons family can be seen underneath the Nuclear Power Plant, as well as Godzilla's skeleton.
- Mr Burns and Smithers resemble, respectively, the Pale Man and a fairy from Pan's Labyrinth.
- Items on the store checkout resemble devices from the film Cronos
- Maggie is priced at the checkout as 666, the 'number of the beast'.
- The resemblance of the store cashier, Marge and Baby Gerald as oversized cockroaches is a reference to the film Mimic.
- The school band features: the original Phantom of the Opera, the 1925 version, 1943 version, and 1962 version. Mr Largo, however, resembles the Phantom of the Paradise.
- As Lisa leaves the music room, paintings are hanging on the wall showing: the alien Maggie from Treehouse of Horror IX, Dr Hibbert and human-animal hybrids from Treehouse of Horror XIII, Homer as the Raven-tormented narrator Treehouse of Horror I, and the Grand Pumpkin from Treehouse of Horror XIX.
- Cthulhu makes an appearance; this may also be a reference to Guillermo del Toro's planned film of At the Mountains of Madness.
- Horror/science-fiction writers HP Lovecraft, Edgar Allan Poe, Ray Bradbury and Richard Matheson all make a cameo, doing things relating to their works: Lovecraft (author of the Cthulhu Mythos) drinks tea with one of Cthulhu's tentacles, Poe (author of The Raven) feeds a 3-eyed raven, Bradbury (author of The Illustrated Man) draws on a tattooed man, and Matheson (author of I am Legend) stands next to one of the novel's vampires.
- The mob of classic monsters chasing Bart and the others consists of: Boris Karloff's Frankenstein's Monster, Bela Lugosi's Dracula, Lon Chaney Jr's the Wolfman, the Metaluna Mutant from This Island Earth, Karloff's Mummy, Gillman from Creature from the Black Lagoon, the Bride of Frankenstein, and Claude Rains' Invisible Man.
- Maggie drives the hearse from the movie The Car.
- Characters appearing in the panning shot are: the plant god from Hellboy II, Rod Serling (Twilight Zone creator/narrator), the robot from Lost in Space, the Man in the Beaver Hat from London After Midnight, the titular creature from Alien, the Ymir from 20 Million Miles to Earth, one of the Mole People, the skeleton soldiers from 1963's Jason and the Argonauts, the creature from The Thing from Another World, a Morlock from The Time Machine, Ro-Man from Robot Monster, Cavor's craft from First Men in the Moon, Count Orlok from Nosferatu, aliens from Invasion of the Saucer Men, the Fly, Klaatu's spaceship and the robot Gort from The Day the Earth Stood Still, two of the 'freaks' from Freaks, and Rondo Hatton from House of Horrors.
- In the couch gag, Homer resembles the ghost Santi from The Devil's Backbone.
- Lisa falls down an Alice in Wonderland-style portal, wearing Alice's iconic costume.
- Hypnotoad from Futurama makes a cameo appearance.
- The final segment references Pan's Labyrinth again: the throne room is the same, Marge and Homer resemble the King and Queen of the underworld, Lisa is dressed as protagonist Ofelia, there are small fairies flying about, and Bart resembles the Faun.
- "Oh, the Places You'll D'oh!" is a parody of Dr Seuss, the Fat in the Hat and the Borax spoofing the Cat in the Hat and the Lorax.
- The mask The Fat in the Hat wears when blowing up city hall looks similar to Guy Fawkes Mask from the movie V for Vendetta.
- "Freaks, no Geeks" is a parody of the film Freaks, and the title is a parody of the short lived show Freaks and Geeks.
- The last scene where Homer says "And that kids is how I met your mother" references the show How I Met Your Mother and theme music plays over the credits.
- When Krusty is the funny man he says "Seriously folks, I really think we shoud stop this Hitler guy" and everyone laughs.
- This is the first THOH episode since X to have a couch gag.
- This is the second episode to have a person's head stitched onto another person's shoulders; Mr. Burns' head was attached to Homer's body in an earlier THOH.
- Marge's face is never seen in the first segment (Oh, The Places You'll D'oh!).
- Nelson Muntz is seen as a donkey boy which is a possible reference to Disney's Pinocchio.
- Skinner appears as a freak called the Spineless man. He appeared spineless in "Treehouse of Horror XIV". The title also pokes fun at his character.
- the Gracie Films logo didn't have the scream and instead was replaced by people shouting one of us