Elenco - On Secret Service
Greta Nissen
Marchesa Marcella Galdi
Karl Ludwig Diehl
Captain von Homberg
Don Alvarado
Conte Valenti
Lester Matthews
Coloneilo Romanelli
Esme Percy
Bleuntzli - Reporter
C.M. Hallard
Colonel von Waldmuller
Austin Trevor
Captain Larco
Cecil Ramage
Ermete Davila
Wallace Geoffrey
B-18