Phenomena (1985) is Dario Argento's most beautifully broken film, and probably the clearest proof that his best work doesn't obey anyone else's rules. Where Suspiria (1977) achieved its delirium through pure colour and sensation, Phenomena builds its fever from stranger materials: a telekinetic American schoolgirl, a wheelchair-bound forensic entomologist, a razor-wielding chimpanzee, and a Swiss Alps full of decapitated tourists. The film makes no apology for any of it.
What Phenomena is actually about
Jennifer Corvino (Jennifer Connelly, then 14 years old, entirely committed) arrives at a Swiss boarding school called the Richard Wagner Academy. Argento plants that name deliberately. A killer is working through the local girls, and Jennifer, a sleepwalker with an inexplicable communion with insects, becomes drawn into the investigation. Donald Pleasence plays Professor John McGregor, a Scottish entomologist confined to a wheelchair, who works with local police to track the murders through insect evidence. His assistant is a chimp named Tonga. None of this is presented as unusual.
What Argento understood, perhaps more clearly here than anywhere else in his filmography, is that internal consistency is a trap. Phenomena doesn't try to be coherent. It tries to be overwhelming. Each scene operates at a slightly different temperature than the last: the sleepwalking sequences are gauzy and slow, the kill set pieces are blunt and fast, the finale plunges into something that owes as much to fairy tale as to giallo. Argento cuts between them with the confidence of someone who knows you won't want to look away regardless.
Jennifer Connelly carries an impossible film
Connelly was cast directly from her role in Once Upon a Time in America. She was a teenager facing material that required her to commune with swarms of flies, crawl through a pit of decomposing corpses, and maintain something like genuine emotional presence throughout. She does all of it. Her performance is calm in a way that reads as genuinely strange rather than blank. Jennifer Corvino believes in her gift without melodrama, and Connelly plays that belief straight, which is the only approach that could make the film work.
The insect communication scenes could easily tip into comedy. They don't, partly because of Connelly and partly because Argento shoots them with the same operatic seriousness he brings to the murders. A great fly is a great fly. Jennifer extends her hand and the swarm gathers and the film treats this as simply true. It is, somehow, convincing.
The soundtrack as a second horror
Goblin contributed some of the score, as they did for Argento's earlier films, but Phenomena is the one where he fully embraces heavy metal alongside them. Iron Maiden, Motörhead, and Frankie Goes to Hollywood appear on the soundtrack, sometimes jarringly, sometimes perfectly. When a kill sequence arrives and "Flash of the Blade" kicks in, the effect is disorienting in a way that pure orchestral scoring couldn't achieve. Argento uses the metal the way he uses the insects: as an intrusion from a register the film shouldn't quite contain.
This was a polarising choice in 1985 and it still divides viewers. Some find it crass. The counterargument is that the film is about transgression at every level, and the soundtrack transgresses genre expectation the same way the plot does. It fits, even when it's jarring. Especially when it's jarring.
The logic of the finale
Phenomena ends in a way that would be spoiled by description but that demands acknowledgment: the final 20 minutes accelerate through several separate climaxes, each more extreme than the last, culminating in a scene that is both absurd and genuinely terrifying. The killer's identity lands with a specific species of Argento grotesquerie. The last image is pure shock. None of it resolves cleanly.
This is the film's defining quality. It doesn't wrap. It detonates. Argento's interest isn't in satisfying an audience that came for conventional thriller mechanics; it's in pushing past the point where comfort is possible. In that sense Phenomena shares more DNA with the extreme horror tradition than with the giallo procedurals that preceded it. It wants to leave a mark, not a solution.
Compare this approach to the cold procedural restraint of Cure (1997), where Kiyoshi Kurosawa builds dread through withholding. Argento does the opposite: he gives you everything, all at once, louder than necessary. Both methods produce genuine unease. They just produce different kinds.
Why it's been underrated for forty years
Phenomena opened in a cut version in the United States under the title Creepers, trimmed by roughly 28 minutes. That version strips the pacing and several key character beats, leaving something that registers as incoherent rather than deliriously strange. For a long time, Creepers was how English-speaking audiences knew the film. The full cut, finally widely available on restoration releases by Synapse Films, is a different experience: longer, odder, more patient in its setup and more extreme in its payoff.
The restoration matters. Argento's visual design depends on the Italian landscape having genuine presence: the snowfields, the rock faces, the gloomy interiors of the Academy. The Synapse 4K release gives that landscape its full weight. The insect swarms, photographed with real insects over multiple setups, look extraordinary. This is a film that rewards the best possible presentation.
Phenomena sits in an awkward genre position that probably explains the critical neglect. It's too weird for mainstream horror audiences, too pulpy for arthouse consideration, and too sincere in its lunacy for ironic appreciation. What it is, plainly, is one of the most distinctive films Dario Argento made, and he made some very distinctive films. It knows exactly what it is. Forty years later, nothing else quite resembles it.