The Simpsons Is Doing Halloween Twice This Year — Starting Tonight With "The Revengening"

Springfield does not do anything by halves this Halloween. The Simpsons is splitting its annual horror tradition across two consecutive Sundays, beginning tonight at 8 p.m. Eastern on Fox with Treehouse of Horror Presents: The Revengening, a standalone special built around a single story: a slasher loose in Springfield. The episode streams on Hulu on Monday. The traditional three-segment anthology, Treehouse of Horror XXXVII, follows next Sunday, October 25 — meaning the show's Halloween observance, for the first time in its modern era, occupies a full fortnight of the Fox schedule.

Tonight: one killer, one story, no vignettes

Fox's official description of tonight's episode, carried by Bloody Disgusting's report of the announcement, is admirably blunt: "All hell breaks loose on Halloween when a killer comes to Springfield and hacks their way through town. No Simpson is safe from... THE REVENGENING!" The episode is the 812th of the series overall and the third of Season 38, written by Broti Gupta and directed by Rob Oliver, according to episode reporting by VVIP Times. It also arrives a week later than originally slotted, and the reason is sitting in this site's sports coverage: Fox had committed its October 11 evening to Major League Baseball's postseason — Game 1 of the National League Championship Series between the Dodgers and Brewers — and the animation block yielded to live sports, VVIP Times reported. Springfield's killer waited out the NLCS like everyone else.

The standalone format is the point. As iHorror's account of this year's double bill observes, the Treehouse banner began in Season 2 as three vignettes stapled together — Bart and Lisa trading scary stories in the treehouse — and the show has been pulling that shape apart for a decade: 2015's "Halloween of Horror" gave a full episode to one story, Season 34's "Not It" spent a whole episode on a Stephen King parody, and Season 36's "Simpsons Wicked This Way Comes" ran under the same Presents banner tonight's special uses. iHorror's judgment, offered as criticism but useful as a viewing guide, is that the single-story specials have been the stronger half of the experiment, because twenty-two uninterrupted minutes give a horror joke room to build past its own reference, while a vignette has to land the gag and get out.

Next week: the anthology, with a stop-motion centerpiece

The October 25 anthology returns to the classic structure. Fox's description, via Bloody Disgusting, promises three segments: Marge gets a horrifying new perspective on marriage; Bart and Santa's Little Helper embark on a bone-chilling adventure; and Homer takes a driving lesson. HorrorFuel's report on the released images adds texture to the Marge segment in particular, describing a stop-motion tribute to The Nightmare Before Christmas — Springfield reimagined through Henry Selick and Tim Burton's gothic lens — in which Marge discovers her backyard shed has supernatural, multi-dimensional properties and generates a surreal lineup of replacement husbands. A marriage examined by way of a procession of alternate Homers is, by the standards of this series, an entirely reasonable premise for its 37th Halloween anthology.

A tradition that outlasted its format

The double bill is also a quiet statement about what the franchise is now. Bloody Disgusting's announcement report notes that the very first Treehouse of Horror aired in the show's second season, and that the specials have become such a fixed tradition that the series is essentially the last show on television that would never skip a Halloween episode — while acknowledging that the anthology installments have, over nearly four decades, run through much of the horror canon available to parody. Splitting the observance in two is a solution to that exhaustion: it doubles the canvas without diluting the brand, gives the writers a slasher movie's worth of runway tonight and the anthology's variety next week, and turns a single annual episode into an October arc. The Revengening starts it tonight at 8/7c on Fox. No Simpson is safe; the network said so itself.

The tradition tonight's special extends began in 1990, when the first Treehouse of Horror aired as the third episode of Season 2, framed by Bart and Lisa telling each other scary stories in their treehouse on Halloween night. Its three segments set templates the series has reused for thirty-six years: “Bad Dream House” put the family in a haunted house that wanted them gone; “Hungry Are the Damned” introduced Kang and Kodos, the drooling Rigellian aliens who have appeared in every Halloween episode since; and “The Raven” adapted Edgar Allan Poe with James Earl Jones narrating and Homer as the haunted scholar. The frame device, the aliens and the literary parody all survive into the modern specials in altered form — the Presents banner is simply the latest mutation of a format that has been mutating since its first broadcast, which is part of why a slasher entry like tonight's reads as continuity rather than departure.

Practically, the double bill also solves a scheduling problem Fox created for itself. The network's Sunday animation block is one of its few remaining appointment-viewing assets, and October is its showcase month; losing October 11 to baseball threatened to compress the Halloween observance into a single late episode arriving after the holiday mood had peaked. Splitting the observance across October 18 and October 25 turns the preemption into a build: tonight's special lands close enough to the holiday to function as the main event for viewers who only watch the Halloween episodes, while the anthology next week catches the audience that treats Treehouse night as a fixed annual ritual rather than a date. Both episodes stream on Hulu the day after broadcast, which is where much of that ritual audience now lives anyway. However viewers arrive, the franchise gets two Sundays of Halloween out of a tradition that used to get one — and a killer loose in Springfield gets a full episode to work in, which, by iHorror's longstanding argument about these specials, is when the show's horror writing is at its best.