Dieter Pfaff (2 October 1947 – 5 March 2013) was a German actor and director.The son of a police officer, Pfaff was best known as police officer Hans Sperling in the series of the same name. Sperling also appeared in two films about Swedish policeman Martin Beck, namely Flickan i jordkällaren and Den japanska shungamålningen. In 2002 he starred in Goebbels und Geduldig.