His highlights in the 30s were his appearances in "Der Mann, der seinen Mörder sucht" (1931), Fritz Lang's genius movie "M - Eine Stadt sucht einen Mörder" (1931), "Berlin - Alexanderplatz" (1931), "Der Hauptmann von Köpenick" (31), "Yorck" (1931), "Das indische Grabmal" (1938) and "Mordsache Holm" (1938).