Roland Silbernagl In his latest short film Bluatstilln actor Roland Silbernagl gives his debut as a film director. After engagements at the Staatstheater Mainz, Städtische Bühnen Osnabrück and Theater Bonn he appeared in TV-series such as Tatort Köln and Spuren des Bösen. In the film Zingerle (2018) he portrayed the serial killer Guido Zingerle widely known as “The Monster of Tyrol”. In 2003 Silbernagl founded the international and renowned cultural festival Stummer Schrei, which holds place in Stumm in Zillertal (AT) every two years.