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

Arthur B. Woods

Director