Episode - 7F04\\
First Aired - 10/25/1990

In this, the very first ''Simpsons'' HalloweenEpisode, Bart and Lisa tell scary stories in the tree house (while Homer listens in): The Simpsons move into a haunted house in "Bad Dream House," The Simpsons are abducted by aliens in "Hungry Are the Damned," and EdgarAllanPoe's ''The Raven'' is acted out by Homer and a raven who looks like Bart.
''Treehouse of Horror'' has the following tropes:

* AdultFear: ''The Raven''. The kids aren't scared, but the idea of a beloved wife who may have [[CameBackWrong Come Back Wrong]]? Terrifying to Homer.
* AnimatedAdaptation: Exactly what ''The Raven'' segment was.
* CallARabbitASmeerp: Marge is amazed that the aliens speak English, but it turns out they actually speak "Rigelian", which, by "an astonishing coincidence" is exactly similar to their language.
* ChuckCunninghamSyndrome: Serak the Preparer has never returned as, unlike Kang and Kodos, "he costs money."
* TheConscience: Exploited by the cursed house.
-->'''Ominous voice''': They are all against you, Bart... You must kill them all... They all must die!\\
'''Bart''': Are you my conscience?\\
'''Ominous voice''': I- ''Yes!'' I am!
* DivergentCharacterEvolution: Kang and Kodos were peaceful aliens. But in later appearances, they become invaders.
* DramaticReading: James Earl Jones' narration from ''The Raven''.
* EarlyInstallmentWeirdness: The cast and crew don't use the "scary names", and the Gracie Films VanityPlate doesn't have organ music and a scream replacing its usual sound effects; both of these traditions began the following year. Additionally, all three segments have different directors; every other Treehouse just has one (and later, they would just have one writer instead of three).
** All three segments are told from inside Bart's treehouse, thus illustrating the episode's title. Later "Treehouse of Horror" episodes don't use this location as a FramingDevice (and ones much later wouldn't use a framing device at all).
** Kang and Kodos are actually peaceful beings who don't want to conquer Earth. Maybe they changed their mind after Lisa thought they wanted to eat them and, as a result, became vengeful (like how Bart and Lisa caught Sideshow Bob and now Bob wants to kill Bart).
** Compared to later ''Treehouse of Horror'' editions, the horror elements in this first episode are pretty tame and don't rely on graphic violence. The comedy still holds up perfectly, though.
* FramingDevice: All three segments are told in Bart's treehouse, thus explaining the PunBasedTitle "Treehouse Of Horror".
* HauntedHouse: "Bad Dream House."
* HeyItsThatVoice: Creator/JamesEarlJones voices the mover in "Bad Dream House", the third alien, Serak the Preparer, in "Hungry Are the Damned", and the narrator in "The Raven".
* IndianBurialGround: The house in "Bad Dream House" was built on one. Though Homer claims to have never been told that, it turns out the former owner "mentioned it five or six times."
* TheLostLenore: Marge's role in "The Raven".
* NiceJobBreakingItHero: The family blames Lisa for missing a chance for happiness on another planet by believing the aliens were evil. And she agrees, [[HumansAreTheRealMonsters to a point]].
* NothingIsScarier: Dismissed by Bart during "The Raven."
-->'''Bart:''' You know what would've been scarier than nothing?\\
'''Lisa:''' ''(annoyed)'' What?\\
'''Bart:''' Anything!
* RedHerring: "Hungry are the Damned" is loaded with them, to the point of making no sense at all on rewatches.
* RunningGag: Blowing away the space dust from the cookbook in "Hungry are the Damned".
* ShoutOut: Many.
** The grave stones have shout-outs to Music/PaulMcCartney (referencing the ''"Paul is dead"'' urban legends), NewspaperComics/{{Garfield}}, Music/TheGratefulDead, [[WesternAnimation/CasperTheFriendlyGhost Casper the Friendly Boy]], Music/ElvisPresley and [[DeaderThanDisco disco]].
** The haunted house where The Simpsons has references to ''Film/{{Psycho}}'' (the shape of the house), ''Film/TheAmityvilleHorror'' (blood oozing down the walls) and ''Film/{{Poltergeist}}'' (a portal to another dimension and the house being built on an Indian burial ground) and ''Literature/TheFallOfTheHouseOfUsher'' (the way the house dies).
** Homer planning to kill Marge with an axe references ''Film/TheShining'', which is also a horror film about a haunted house.
** Maggie spins her head like the girl in ''Film/TheExorcist''.
** Among the names in the Indian burial ground we can read Hiawatha, Cochise, Pocahontas, Sitting Bull, Geronimo, [[Radio/TheLoneRanger Tonto]], Crazy Horse, Not-So-Crazy Horse, Sacajawea and [[TheLastOfTheseIsNotLikeTheOthers MahatmaGandhi]]. Also note that both Hiawatha and Tonto are fictional Native Americans.
** The names of Kang, Kodos and Serak are all shout outs to names of ''Series/{{Star Trek|The Original Series}}'' characters.
** The plot of the aliens cooking for the humans is a reference to Series/TheTwilightZone episode ''"To Serve Man"''.
** Kang shows their advanced alien technology, which turns out to be nothing more than a ''VideoGame/{{Pong}}'' game. Even the Simpsons are not amazed by this primitive game.
** "The Raven" is a word-for-word retelling (or almost word-for-word, as a few stanzas were cut for time) of the original Creator/EdgarAllanPoe poem, to the point where Poe was even given a (posthumous) writing credit for this segment alongside producer Sam Simon.
** Many other Poe stories are referenced in "The Raven". The stories which Bart (as the Raven) pulls off from the bookshelf are ''Literature/ThePitAndThePendulum'', ''Literature/TheTellTaleHeart'', and ''Literature/ThePurloinedLetter''.
** Bart references the first ''Film/FridayThe13th1980'' film at the end of the episode as being "...pretty tame by today's standards."
* SophisticatedAsHell: "Quote the raven: 'Eat my shorts!'"
** Extends to the entire segment as well. Part of the humor comes from [[FatIdiot Homer]] directly quoting the book in juxtaposition to JamesEarlJones' deep booming narration.
* SpecialGuest: Creator/JamesEarlJones as the mover, Serak the Preparer, and the narrator of "The Raven".
* SureLetsGoWithThat: When Bart asked the Ominous voice (the haunted house) if it was his conscience, it hesitated before answering: "Yes".
* ValuesDissonance: InUniverse- when Bart scoffs at ''The Raven'' poem's ''supposed'' scariness, Lisa then suggests that maybe people were easier to scare at the time it was written (like with the first ''Friday the 13th'' movie, which, according to Bart, is: "pretty tame by today's standards.")