Meanwhile, Jennifer Corvino, the daughter of a famous American actor, arrives at the Swiss Richard Wagner Academy for Girls, chaperoned by Frau Brückner, who places her with roommate Sophie.

Jennifer flees to McGregor's home, where he gives her a glass case with a Great Sarcophagus fly to help her find the murderer's lair.

The fly leads her to the same cottage Vera had before being killed, but Jennifer finds it unoccupied and is scared away by the house's real estate agent.

Inspector Geiger, who was secretly following Jennifer, talks to the real estate agent in order to learn the identity of the house's previous occupant.

Meanwhile, Geiger's investigation leads him to a mental hospital in Basel, where he learns that a former staff member had been attacked 15 years before by one of the male inmates.

Argento became inspired to write and direct Phenomena after hearing a French radio broadcast detailing a murder case that had been solved thanks to the study of insects present on the corpse.

[8] Screenwriter Franco Ferrini stated that, visually, Argento was inspired by Caspar David Friedrich paintings, noting the artist's purely Romantic portrayal of people and nature.

[6] Originally, Argento wanted Connelly's character to be portrayed as the daughter of Al Pacino, and planned to have photos and video clips of him included in the film.

Spiders, including black widows, and scorpions were imported from Africa, while flies, grasshoppers and wasps were raised in various parts of Rome.

[12] The chimpanzee, Tanga, who had previously starred in Bingo Bongo,[13] proved difficult to direct, as Argento wanted to avoid its performance seeming comical.

[11] During the film's climax, the hand wielding the straight razor hitting Daria Nicolodi was in fact Tanga's own, which managed to scar her despite the object being blunted.

[14] In 2008, Connelly stated on Late Night with Conan O'Brien that Tanga continued to act aggressively toward her from that point on,[15] thus necessitating a body double for some scenes.

[11] For the swarming scenes, special effects artist Sergio Stivaletti superimposed slowed-down footage of coffee granules floating down a fish tank over the film shot.

[19] In a 2015 interview, actor Davide Marotta, who played Brückner's son, recalled the lengthy process of making a mold of his head, and stated that his death scene involved being smeared in glucose before having 40 million insects released on him.

[22] Goblin frontman Claudio Simonetti wrote the film's main theme, which features the solo soprano voice of Pina Magri.

[23] It also includes heavy metal music by artists like Iron Maiden and Motörhead as well as goth favorites such as Sex Gang Children.

[24] Phenomena earned 2.7 billion lire at the Italian box office, outgrossing films such as Gremlins, Dune and The Terminator.

[4] The Guardian declared that Creepers was "Argento at his most throw away" and that the film paled in comparison to earlier efforts such as The Bird with the Crystal Plumage (1970) or Suspiria (1977).

[30] The New York Daily News deemed Creepers "a boring, poorly told exercise in gratuitous nausea and Grand Guignol gore, padded with seemingly interminable stretches of static filler," though they conceded that it "boasts a semi-original premise for a slasher movie.

"[32] The Sunday Times found Creepers "only intermittently frightening" and an audience with "a taste for discreetly revealed schoolgirl thigh and/or insects will not be completely disappointed".

[33] Malcolm Johnson of the Hartford Courant criticized some of the film's special effects, but concluded: "Otherwise, Argento displays his customary skill at horror chic.

He plays Old World elegance against horrific sights as electronic scoring and macabre rock songs by Bill Wyman, Iron Maiden, and others give Creepers a loud, mad buzz.

[48] After Phenomena, Daria Nicolodi repudiated the film, labeling it "reactionary" on account of its portrayal of handicapped people, and stated on interview that she would no longer work with her husband Argento.