Tenebrae is a 1982 Italian giallo film written and directed by Dario Argento. The film stars Anthony Franciosa as American author Peter Neal, who – while in Rome promoting his latest murder-mystery novel – becomes embroiled in the search for a serial killer who may have been inspired to kill by his novel. John Saxon and Daria Nicolodi co-star as Neal's agent and assistant respectively, while Giuliano Gemma and Carola Stagnaro appear as detectives investigating the murders. John Steiner, Veronica Lario, and Mirella D'Angelo also feature in minor roles. The film has been described as exploring themes of dualism and sexual aberration, and has strong metafictional elements; some commentators consider Tenebrae to be a direct reaction by Argento to criticism of his previous work, most especially his depictions of murders of women.

Deep Red, also known as The Hatchet Murders, is a 1975 Italian giallo film directed by Dario Argento and co-written by Argento and Bernardino Zapponi. It stars David Hemmings as a musician who investigates a series of murders performed by a mysterious figure wearing black leather gloves. The cast also stars Daria Nicolodi, Gabriele Lavia, Macha Méril, and Clara Calamai. The film's score was composed and performed by Goblin, the first in a long-running collaboration with Argento.