In 1972 Foster played two roles, on opposite sides of the law. The first was the cynical Dutch detective Van der Valk, a role he played, on and off, until 1992. The second was a serial murderer in Alfred Hitchcock's film "Frenzy". "Frenzy" was one of Hitchcock's last films, made towards the end of an acclaimed and commercially highly successful career, and caused controversy for the scene in which Foster was required to simulate a rape and a murder, reportedly driven by Hitchcock's desire to prove that he was still relevant as a director in a more permissive age. Michael Caine had previously rejected the role and criticised the nature of the film.