The Winged Mystery

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.

• Joseph De GrasseDirector
• William ParkerWriter

• Franklyn FarnumCapt. August Sieger / Louis Siever
• Claire Du BreyGerda Anderson
• Rosemary ThebyShirley Wayne
• Charles Hill MailesJosiah Wayne
• Sam De GrasseMortimer Eddington
• T.D. CrittendenHenry Waltham Steele
• Fred MontagueCapt. Bernard (as Frederick Montague)