Tenderness of the Wolves/ Die Zärtlichkeit der Wölfe Release date: 1973-07-12 Genres: Horror, Crime, Drama Actors: Kurt Raab, Rosel Zech, Peter Chatel, Margit Carstensen, Hans Hirschmüller, El Hedi ben Salem, Jürgen Prochnow, Friedrich Karl Praetorius, Heinrich Giskes, Rainer Will, Irm Hermann, Karl Scheydt, Ulli Lommel, Wolfgang Schneider, Christoph Eichhorn, Renate Grosser, Ingrid Caven, Rudolf Waldemar Brem, Brigitte Mira, Wolfgang Schenck, Tana Schanzara, Karl von Liebezeit, Barbara Bertram, Erwin Bootz, Oliver Hirschmüller, Jeff Roden, Johannes Wacker, Rainer Hauer, Walter Kaltheuner, Hans Tarantik, Inigo Natzel, Hannelore Tiefenbrunner Direction: Rainer Werner Fassbinder, Joachim Preen Runtime: 1 h. 22 min. Score: 5.7/10 Votes: 43 Countries: Germany Companies: Tango Film Available* : Overview: A German serial killer preys on boys and young men during the so-called years of crisis between the wars. Based on the true story of Fritz Haarmann, aka the Butcher of Hanover and the Vampire of Hanover.