[[caption-width-right:320:"Very soon now, everything around you will become dark, and someone will take your hand".]]

A 1980 Italian horror film by Creator/DarioArgento, not to be confused with [[Literature/TheDivineComedy Dante's poem]] or the [[Literature/DanBrownsInferno novel and film of the same name]].

Rose Elliot, a poetess living in UsefulNotes/NewYorkCity, purchases a book from a local antiques dealer. Written by an alchemist known as Varelli, the book explains how the author was commissioned by three evil (and very powerful) witches to construct stately mansions for them, from which they rule over the world with insanity, grief and despair. Realizing that the apartment she now resides in might be the home of Mater Tenebrarum, the Mother of Darkness, Rose writes to her brother Mark, currently studying music in UsefulNotes/{{Rome}}, to warn him of her fears.

Mark returns to New York, and finds that Rose has vanished. Taking up residence in her apartment, Mark tries to piece together the whereabouts of his sister, only to discover that her initial fears were horribly correct.

The second film in a loose trilogy (between ''Film/{{Suspiria}}'' and ''Film/MotherOfTears''), in terms of storytelling ''Inferno'' is the most alien of the three. While ''Suspiria'' walked a thin line between murder mystery and surreal horror, ''Inferno'' dispenses with any sort of narrative structure, instead running on a dream logic that makes no concessions to reality.

!! This film provides examples of:

* AlienGeometries: The far out architecture of Rose's apartment (to say nothing of the [[Film/{{Suspiria}} Tanz Akademie]] or the [[Film/MotherOfTears Palazzo Varelli]]) makes more sense when you realize it was designed by a medieval alchemist.
* AssholeVictim: [[spoiler: Kazanian who drowned a few cats out of annoyance and ended up being eaten by rats and stabbed to death for knowing too much. Also Carol who was in cahoots with the coven if not a member herself and ended up burned to death.]]
* BigBad: Mater Tenebrarum [[spoiler: who is disguised as the nurse]]
* TheButlerDidIt: [[spoiler: Subverted, though it's implied not for lack of trying.]]
* CallBack: [[spoiler: When the apartment building begins to burn, Mater Tenebrarum cryptically says it's happening "Just like before." This may refer to the destruction of the Tanz Akademie in ''Film/{{Suspiria}}''.]]
* CatsAreMean: Easily one of the most unintentionally hilarious examples ever comitted to film.
* TheCruella: Kazanian, although considering events earlier in the film, he may be somewhat justified.
* DecoyProtagonist: Several.
* EarlyBirdCameo: [[spoiler: Mater Lachrymarum,]] who serves as the main antagonist in [[spoiler: ''Film/MotherOfTears'']], makes a brief appearance in this film, although played by a different actress.
* EatenAlive: [[spoiler: Kazanian by rats.]]
* EncyclopediaExposita: ''The Three Mothers'', by E. Varelli.
* TheFaceless: In contrast to ''Suspiria'', where [[spoiler: the entire faculty belongs to the coven]], the faces of Tenebrarum's coven and servants are appropriately masked by shadow at all times.
* FailureHero: Unlike Suzy in ''Suspiria'', Mark had done nothing to contribute to the villains's defeat. Tenebrarum died in the fire that she had unintentionally caused on her own through one of her murders.
* GainaxEnding: More "Gainax Entire Film." Between the insane colors and architecture, good luck figuring out what's happening at any given time. It does, however, look very cool.
* HeKnowsTooMuch: [[spoiler: Why Sara, Rose, and Elise are all killed.]]
* HellHotel: Apartment, but the principal is the same.
* TheHecateSisters: The Three Mothers.
* LaserGuidedKarma: [[spoiler: Elise's butler and Carol the caretaker are glad that she is gone because they can steal her belongings. Carol even implies that she knows and is allied with Elise's killers. The butler has his eyes gouged out (but still attached to the nerves), and Carol accidentally starts the fire which destroys the building. In her attempt to put the flames out, she gets tangled in curtains, set on fire, and then stumbles out a window and falls several stories to her death.]]
* NeverFoundTheBody: [[spoiler: Every last death other than Varelli's.]] This is partly what leads to the titular inferno. [[spoiler: It's entirely possible that Mother of Shadows does not die at all, as her guise as Death simply vanishes amid flames.]]
** [[spoiler: Considering the last time we see her she's screaming as her house falls apart around her, it'd be reasonable to assume she died with her house, much like her predecessor.]]
* OffWithHisHead: Subverted. [[spoiler: Rose is nearly decapitated by a large pane of glass, only it doesn't completely sever her head from her body. Instead, it's repeatedly slammed into her neck harder and harder, cutting deeper through until she finally dies.]]
* PinballProtagonist: Played straight, but arguably proof that [[TropesAreTools Tropes Are Not Bad]]. [[spoiler: Mark]] survived and may have played a role in the death of Mater Tenebrarum, but even at the end has little more than faint hints as to what happened.
* PopStarComposer: [[Music/EmersonLakeAndPalmer Keith Emerson]] wrote the music.
* SceneryPorn
* SoundtrackDissonance: Perhaps the best music for sneaking around the BigBad's lair isn't bombastic OminousLatinChanting set to synthesized and up-tempo organ. However, it makes sense in terms of being a key component to support Argento's visual aesthetic.
* SwarmOfRats: [[spoiler: Kazanian encounters these after drowning a sackful of cats. Just desserts, perhaps.]]
* ThematicSeries: The second part of the Three Mothers Trilogy with ''Susperia'' and ''Mother of Tears''.
* {{Video Nast|ies}}y: Was placed on the list in 1984, was dropped just a year later, and was released uncut in 2010.
* WalkOnWater: After Kazanian falls into the Central Park Lake and is attacked by rats, a hotdog vendor brandishing a knife runs across the lake and finishes him off.