Based on the spy novel of the same name by Jacques Futrelle.
Florence Lawrence
Isabel Thorne
Sidney Bracey
Luiigi
Harry F. Millarde
Hamilton Grimm
Wallis Clark
Prince D'Abruzzi
William Welsh
Chief Campbell
Paul Panzer
Coount Rosini
Eugene Gaudio
Cinematography
Raymond L. Schrock
Screenplay
Stuart Paton
Director
Jacques Futrelle
Novel