Peter Lorre stars in Fritz Lang’s sympathetic and terrifying story of a child murderer, made in Germany in 1931. The underworld joins forces with the police in tracking down Lorre’s plump, helpless maniac because his atrocities have interrupted the course of crime-as-usual. The moral issues are complex and deftly handled: Lorre is at once entirely innocent and absolutely evil. Lang’s detached, modified expressionist style gives the action a plastic beauty: the geometry of the images is reflected in the geometry of the plot, as every piece of film clicks together on its way to the inevitable climax. Two lines meet, and Lorre is at the center. In German with subtitles. This partial restoration, by the Munich Film Archives, runs 105 minutes, about seven minutes longer than other recent versions.