Episode - 8F02\\
First Aired - 10/31/1991

This year's Halloween special comes from candy-induced nightmares: In "Lisa's Dream," Homer's monkey paw souvenir from Morocco makes wishes come true for his family and misfortune to befall everyone else, in "Bart's Dream," Bart's omnipotence forces everyone in town to be a StepfordSmiler or incur his wrath, and in "Homer's Dream," Mr. Burns builds the perfect plant worker and [[EpicFail uses Homer's brain to make the robot come to life]].

This was also the first episode (in production order) to be animated by a company outside {{Creator/AKOM}}, specifically [[Creator/SunwooEntertainment Anivision]]. Who would go on to be a regular contributor for the series until season 10.

!!Tropes included in this episode:
* AcidRefluxNightmare: The FramingDevice is a series of nightmares induced by eating too much Halloween candies.
* ArsonMurderAndJaywalking: A variation as Burns describes his condition after accidentally being crushed by his deactivated robot.
-->'''Mr. Burns:''' Every bone in my body broken... Vital organs leaking fluid... Slight headache... Loss of appetite... Smithers, I'm going to die.
* BazaarOfTheBizarre: Homer buys a monkey's paw in a Moroccan bazaar, [[TheLittleShopThatWasntThereYesterday that seems to vanish afterwards]], but it turns out he just looked in the wrong direction.
* BeCarefulWhatYouWishFor: "Lisa's Dream". Everything the family wishes for gets twisted around by the Monkey's Paw, except for Maggie. Subverted when Ned gets it and everything goes right for him (at least on an immediate basis--look below).
** Maggie's wish - At first, it seems she's requested a gigantic, fancy limo...but it turns out it's only there to deliver her real wish: a new pacifier. Nothing goes wrong with that one.
** Bart's wish - He wants the Simpsons to be rich and famous, which eventually results in the world at large getting sick of them.
** Lisa's wish - She asks for world peace, but the universal pacifism and lack of weapons makes it easy for extraterrestrial aliens to conquer Earth.
** Homer's wish - He asks for a turkey sandwich, but then it turns out the [[{{ArsonMurderAndJaywalking}} turkey is a little dry]].
** Though, after Flanders wishes to get rid of the aliens Kang and Kodos state that humanity will now build bigger and bigger boards with nails, until they destroy themselves. His second wish changes his house into a castle, but the story ends before we can see if there is anything wrong with it.
* BigBrotherIsWatching: How Homer is fired from the nuclear power plant. Interestingly, it's one of the few times in the series when Homer is [[RealityEnsues actually fired for incompetence.]]
--> '''Smithers''': ''(over intercom)'' Attention: Homer Simpson. Attention: Homer Simpson. Wake up, Homer!\\
'''Homer''': ''(wakes up)'' Huh? Wha?\\
'''Smithers''': You're fired.\\
'''Homer''': For what?\\
'''Smithers''': For sleeping on the job.\\
'''Homer''': How'd you know I was sleeping?\\
'''Smithers''': We've been monitoring you on the surveillance camera.\\
'''Homer''': Camera? ''(notices it)'' D'oh!
* BodyHorror: What happens to anyone who doesn't think happy thoughts in Bart's dream.
* BrickJoke: Early on in Bart's dream, American history is rewritten because of Bart, so that America is called "Bonerland". Later on, Bart and Homer go to visit Dr. Marvin Munroe, part of the Bonerland Medical Association.
* CatapultNightmare: The end of "Bart's Dream."
* CreatingLifeIsBad: Apparently, because it will only eat donuts and sleep on the job.
-->'''Mr. Burns:''' Oh, Smithers, I was wrong to play God! Life is precious, not something to be toyed with. Now take out that brain and flush it down the toilet!
* EasilyThwartedAlienInvasion: Parodied in "Lisa's Dream", Ned wishes that the aliens were gone. Cue Moe (and only Moe) chasing them away.
-->'''Kodos:''' He's got a board with a nail in it!
* EatTheCamera: Done at the end of Bart's nightmare, when he wakes up screaming (because of Homer ''kissing'' him, among all things.)
* ExactWords: Homer uses the paw to wish for a turkey sandwich, and specifies that he wants no "weird surprises". It turns out the turkey in the sandwich is a little dry.
* FaceHeelTurn: After turning out to be GoodAllAlong in their previous appearance, this time, Kang and Kodos are unambiguously evil.
* EverybodyLives: To date, this is the only Halloween special where no-one dies (unless one counts Mr. Burns's head being separated and placed onto Homer's head as a death)..
* FailedASpotCheck: Mr. Burns needs a brain for his robot? When he and Smithers first walk into the lab and pass by the GratuitousLaboratoryFlasks in the foreground, there's a living human brain in a specimen dish right there.
* FauxHorrific: In "Bart's Dream," Dr. Monroe suggests that Bart is using his omnipotent powers as a way to earn Homer's affection. He encourages the Simpson men to spend quality time together. They do so, become much closer, and say that they love each other. Homer then gently kisses Bart on the head...which cause the ''real'' Bart to wake up screaming in terror.
* {{Foreshadowing}}: Lisa's nightmare begins with a dream-like crossfade, and Bart's nightmare as he closes his eyes (seen from the viewer's POV). Homer's "nightmare" just has a straight cut to the beginning of the story, foreshadowing the twist ending.
* GoneHorriblyWrong:
--> '''Mr Burns''': It wasn't supposed to be this way! It was supposed to be a thing of beauty, not this abomination!
-->''(cut to the Homer robot loudly snoring while asleep at its post)''
* GratuitousLaboratoryFlasks: When Mr. Burns and Smithers descend into Burns' laboratory, they pass a worktable in the foreground featuring loads of glassware and a human brain in a dish. As they pass behind them, the audience's views of their bodies become distorted, stretched and squashed when viewed through the liquids.
* GraveRobbing: In "Homer's Dream," Mr. Burns and Smithers do this to find a brain for their robot. They find Homer sleeping in an open grave.
-->'''Mr. Burns:''' I feel like a kid in a candy store!
* HowHardCanItBe: Homer's question when Lisa realized a possible job requires to operate an ultrasonic lithotriptor. Lisa shakes her head at Homer's question.
* InsufficientlyAdvancedAlien: In "Lisa's Dream," after humanity has gotten rid of their weapons, Kang and Kodos conquer Earth with slings and clubs.
-->'''Kang:''' Your superior intellect is no match for our puny weapons!
* InYourNatureToDestroyYourselves: What Kang and Kodos are convinced humanity will do after being chased off the planet.
--> '''Kodos''': Well, Kang, it seems the earthlings won.\\
'''Kang''': Did they? That board with the nail in it may have defeated us, but the humans won't stop there. They'll make bigger boards and bigger nails. Soon, they will make a board with a nail so big, it will destroy them all! ''(both laugh)''
* {{Irony}}:
--> '''Lisa''': I wish for world peace!\\
'''Homer''': Lisa, that was very selfish of you!
* JackassGenie: As usual, the Monkey Paw.
* {{Jerkass}}: Jimbo and Kearney threaten to egg Homer's house if he didn't hand over the candy bowl...then they egg it anyway and smash his pumpkin.
* LaserGuidedKarma: When Flanders gets the Monkey's paw, it works flawlessly for him.
* MoralityPet: In "Homer's Dream", after the experiment is a proven failure, Smithers gets Burns to reverse the procedure on Homer.
* TheLittleShopThatWasntThereYesterday: Parodied:
-->'''Marge:''' Eugh! Homer, where did you get that ugly thing?
-->'''Homer:''' From that little shop right over there--''(Points to an empty lot, where sand devils whirl. He gasps in disbelief, then corrects himself.)'' Oh, no, wait, it was right over there.
-->'''Shop Vendor:''' ''(waving)'' You'll be sorrrrrrry!
* MultipleHeadCase: Mr. Burns' head is stitched to Homer's body.
* NotHyperbole: When everyone starts to despise the Simpsons for appearing everywhere:
--> '''Homer''': Come to think of it, the guy who sold me this thing said the wishes would bring "grave misfortune". I thought he was just being colorful.
* NotSoAboveItAll: Burns using the brain as a coonskin cap and yelling, "Look at me! I'm Davy Crockett!"
* OnlySaneWoman: Marge (as usual) takes this role throughout the episode. In the framing device, she warns everyone not to eat too much candy; in "Lisa's Dream," she's the only person who suggests that the wishing might go wrong; and in "Bart's Dream," she demands that the family attend therapy to sort out their problems.
* OnTheNext: Parodied at the end of "Homer's Dream." Homer wants to go to a spaghetti restaurant, while Burns insists on attending a reception for the Queen of Holland.
-->'''Homer:''' Oh, I hate having two heads!
** Given that the subject of the next episode had Lisa get a pony and Homer needing a 2nd job just to make ends meet, it would be very hard for both to co-exist
* OrWasItADream: The end of "Homer's Dream," where Homer finds Mr. Burns' head grafted to his shoulder.
-->'''Homer:''' I didn't wake up! It's all a dream! It's just a dream!\\
'''Mr. Burns:''' Oh, that's right. It's all a dream... or is it?! ''[[EvilLaugh (laughs)]]''
* PoliceAreUseless: Justified in both Lisa's and Bart's dreams. In the former, they could not stop the aliens due to Lisa's wish on world peace. In the latter, since Bart has powers that he uses whenever he is not pleased, all the cops could do is wave "Hi Bart!" when the bus passes them at [[Film/BackToTheFuture 88 miles per hour]].
* PsychicStatic: Homer attempts this when he tries to kill Bart in "Bart's Dream," using the traditional "think other thoughts" method. The problem? His "other thoughts" are thoughts about ''not'' thinking about killing Bart ("OK, don't think about how you're going to kill him"). Needless to say, it doesn't work.
* PunyEarthlings: Subverted for laugh. Kang and Kodos only invade Earth after humanity has voluntarily dissolved its militaries and destroyed all its weapons, leaving them helpless against the aliens' arsenal of wooden clubs and slingshots. The aliens even boast, "Your superior intellect is no match for our puny weapons!" They flee the planet when Moe thinks to attack them with a wooden board that has a nail sticking out of it.
* PuppyDogEyes: How Smithers gets Mr. Burns to return Homer's brain to his body.
* RealityWarper: Bart in "Bart's Dream." Justified as it's a parody of the famous ''Twilight Zone'' episode about a boy who had similar powers.
* RidiculousExchangeRates: On their way back from Morocco, Homer is frisked by airport security and is revealed to have smuggled food under his shirt. This leads to:
--> '''Airport security''': You must pay a fine!... of two American dollars.\\
'''Homer''': ''(nonchalant)'' Okay.
* RockBeatsLaser: Parodied. The primary weapon for the human uprising against their alien overlords is Moe wielding a board with a nail in it. This makes sense considering the aliens invaded when the entire earth was unarmed after Lisa wished for world peace, and had things like slingshots. After being driven off, the aliens muse that one day the humans will "create bigger boards and bigger nails" until one day "they will create a board with a nail so big it will destroy them all!"
-->'''Kang''': Your superior intellect is no match for our puny weapons!
* SelfDeprecation: After wishing The Simpsons to become rich and famous a large merchandising campaign starts up, causing the general public to grow tired of them.
-->'''Otto:''' ''(listening to a Simpsons album)'' Man, this thing is really getting out of hand.\\
'''Helen Lovejoy:''' Is there anything they won't do?
* SharingABody: Mr. Burns's head is stitched to Homer's body.
* ShoutOut:
** The gravestones at the start show the tombstones of [[Disney/{{Bambi}} "Bambi's Mom"]], [[Music/TheDoors Jim Morrison]] (which has writing all over it and is being worshipped by hippies, which how Morrison's grave looks in real life), and Creator/WaltDisney (with icicles and frost all over it, a reference to the urban legend that Disney is cryogenically frozen).
** The children in Halloween costumes running past Homer's door are a reference to ''WesternAnimation/ItsTheGreatPumpkinCharlieBrown''.
** Lisa's dream is a reference to [[Literature/TheMonkeysPaw The Monkey's Paw]].
*** Homer being searched by the Moroccan police at the airport is a reference to the arrest of the drug smuggler in ''Film/MidnightExpress''.
*** Lisa wishes for world peace, which shows scenes of Argentina and the United Kingdom making up over the Falklands and people dancing in a large peace symbol to the tune of the hippie anthem "Get Together" by The Youngbloods.
*** Flanders' castle is a reference to the Disneyland castle.
** Bart's dream is a plot parody of the Series/TheTwilightZone episode "It's A Good Life". Even the narrator's voice spoofs Rod Serling's narration style.
** Homer's dream references ''Literature/{{Frankenstein}}''.
*** Bart and Lisa watch ''Series/TheTonightShow'' with Johnny Carson on TV.
*** Mr. Burns scolds the robot he created with the insult: "Clinking, clattering cacophony of collagenous cogs and camshafts", similar to [[Film/TheWizardOfOz The Wizard of Oz's]] line to the Tin Man: "You clinking, clanking, clattering collection of caliginous junk!"
*** Homer and Mr. Burns's heads sharing the same body reference '' The Thing with Two Heads''
* SkewedPriorities: When Smithers asks Mr. Burns to put Homer's brain back in his own body, Mr. Burns whines: "Oh come on, it's ''11:45''!"
* StepfordSmiler: Everyone in Bart's dream, because if they don't think happy thoughts, Bart turns them into something horrific. And it's a good thing that Bart does that, it's a real good thing.
* StockFootage:
** The footage of Lisa saying, "Don't forget, dad: tonight, my class is having an all-you-can-eat spaghetti dinner." is recycled from "[[Recap/TheSimpsonsS3E5HomerDefined Homer Defined]]".
** The ColdOpen of Marge warning the viewers and the opening pan through Springfield and through the gates of the cemetery are reused from the previous Treehouse of Horror episode, with new dialogue from Marge for the former.
* TemptingFate: Marge warns everyone to not eat too much candy or they'll get nightmares.
* TheyCalledMeMad: "Oh, that fellow at Radio Shack said I was mad. [[IResembleThatRemark Well who's mad now?]] [[EvilLaugh Ah-hahahahahaha]]!
* ThisAintRocketSurgery:
-->'''Mr. Burns:''' Dammit, Smithers! This isn't rocket science, it's brain surgery!
* WhatHappenedToTheMouse: Maggie ate just as much candy as her family at the beginning, so it is possible she had a nightmare as well, but we just don't see it.