The Lost Honour of Katharina Blum, or: How violence develops and where it can lead is a 1975 West German political drama film based on Heinrich Böll's 1974 novel of the same name, adapted for the screen and directed by Volker Schlöndorff and Margarethe von Trotta. Schlöndorff and von Trotta wrote the script with an emphasis on the vindictive and harsh treatment of an innocent woman by the public, police, and media. The film stars Angela Winkler as Blum, Mario Adorf as Kommissar Beizmenne, Dieter Laser as Tötges, and Jürgen Prochnow as Ludwig. In 1984, the film and the novel were adapted into an American TV film, The Lost Honor of Kathryn Beck.