M (1931)
Fritz Lang's 1931 German film. Peter Lorre as a child murderer hunted by both police and the criminal underworld.
Actor: Otto Wernicke
Otto Wernicke played Inspector Lohmann in M and reprised the character in The Testament of Doctor Mabuse, making him one of the earliest recurring characters across two films by the same director. He worked in German cinema through the Weimar and postwar periods.