Mario Bava
Mario Bava was an Italian director, screenwriter, special effects artist and cinematographer from the "golden age" of Italian horror films. His work kick-started the giallo film genre and the modern "slasher film". Bava became a cinematographer in his own right in 1939, shooting two short films with Roberto Rossellini. He made his feature debut in the early 1940s.
His work has proved very influential. Bava directed what is now regarded as the earliest of the Italian giallo films, The Girl Who Knew Too Much (1963) and Blood and Black Lace (1964). His 1965 sci-fi/ horror film Planet of the Vampires was a thematic precursor to Alien (1979). Although comic books had served as the basis for countless serials and children's films in Hollywood, Bava's Danger: Diabolik (1968) brought an adult perspective to the genre. Many elements of his 1966 film Kill, Baby... Kill!, regarded by Martin Scorsese as Bava's masterpiece, also appear in the Asian strain of terror film known as J-horror. 1971's Twitch of the Death Nerve is considered one of the earliest slasher films, and was explicitly imitated in Friday the 13th Part 2.