This 1913 production, a collaboration between the Danish director Stellan Rye and German actor Paul Wegener, is cited by historian Lotte Eisner as the earliest surviving example of an expressionist influence in German cinema. It’s the doppelganger theme, rendered with an enthusiastic use of double exposures and low-key lighting. The screenplay is by Hanns Heinz Ewers, later to become a leading Nazi writer.