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Fritz Lang's 1931 film covers the hunt for a man killing children in Berlin. Police pressure disturbs the underworld too. The criminal organisations start a search of their own. The film uses sound as a new instrument; the narrative questions the justice of the crowd and builds a trial scene at its close. Peter Lorre leads. It is the director's first sound film. The violence is not shown but implied. Who it's for: those interested in the history of cinema and classic crime. Who it's not for: viewers expecting a modern pace; the film keeps the rhythm of its own period.