The Winged Mystery (1917)
Louis and August Siever, the twins sons of a German father and American mother, are traveling in Europe when war breaks out. August joins the Kaiser's army, but Louis, a supporter of the United States, is practically made a prisoner in Berlin for a year while he tries to prove his American citizenship. After a violent confrontation with Louis, August steals his brother's passport and leaves for New York with Gerda Anderson, a German spy.
Director: Joseph De Grasse
![]() |
Franklyn Farnum as Capt. August Sieger / Louis Siever |
![]() |
Claire Du Brey as Gerda Anderson |
![]() |
Rosemary Theby as Shirley Wayne |
![]() |
Charles Hill Mailes as Josiah Wayne |
![]() |
Sam De Grasse as Mortimer Eddington |
![]() |
T.D. Crittenden as Henry Waltham Steele |
![]() |
Fred Montague as Capt. Bernard (as Frederick Montague) |
| Writing | William Parker | Writer |
| Writing | Archer MacMackin | Story |
| Directing | Joseph De Grasse | Director |