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Louise Glaum, one of the more successful "vamp" rivals of Theda Bara, stars in An Alien Enemy. Set during World War I, the film features Glaum in the dual role of espionage agent Neysa von Igel and one "Frau Meyer." Though the film no longer exists, we can assume that Ms. Glaum does her usual, driving helpless men to their doom on behalf of Der Fatherland. Adding to the intrigue is the fact that "Frau Meyer" has a young and virginal daughter, played by Mary Jane Irving. Alien Enemy was directed by Wallace Worsely, the same journeyman who helmed Lon Chaney's Hunchback of Notre Dame (1923).