Deep Red (original title Profondo rosso; 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 was released on 7 March 1975. It was produced by Claudio and Salvatore Argento, and the film's score was composed and performed by Goblin. It stars David Hemmings as a music teacher who investigates a series of murders performed by a mysterious figure wielding a hatchet. Although the film was not a financial success internationally, the film has met with critical acclaim, and is the most well-known giallo film to date.