Hugh Perceval (Screenplay) · Basil Mason (Screenplay) · Edmond T. Gréville (Screenplay)
Neil Hamilton
Lt. Pierre de Montmalion
Brigitte Horney
Lena Schmidt
Gyles Isham
Franz Abel
Ivor Barnard
Baldhead
Charles Carson
Henri
Raymond Lovell
German Secret Service Chief
Frederick Lloyd
French Secret Service Chief
Leslie Perrins
J 14
Hay Petrie
Robert Pigeon
Ben Field
Karl Schmidt
Ralph Truman
Prison Guard
Arthur Hambling
Swiss Official (uncredited)
Vi Kaley
Bakery Customer (uncredited)
Julian Vedey
Cabaret Proprietor (uncredited)
Margaret Yarde
Bakery Customer (uncredited)
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A German-born woman works as a spy for the French in Switzerland during the First World War, and has to marry an interned French lieutenant in order to be able to stay in the country.
