Donald Woods
Juan Cesare
Margaret Lindsay
Florence Ballau
C. Aubrey Smith
Gerard Lytton
Henry O'Neill
Victor Ballau
Robert Barrat
Inspector Von Brinkner
Florence Fair
Teresa
Frank Reicher
Von Stein
Charles Judels
Salvatore
Rafaela Ottiano
Lili Salvatore
Paul Porcasi
Antonio
Eily Malyon
Fredericka
Egon Brecher
Karl
Herman Bing
Baker
Henry Kolker
Auctioneer
Barlowe Borland
Eric (uncredited)
Glen Cavender
Detective (uncredited)
Wheaton Chambers
Servant (uncredited)
Carlos De Valdez
Conductor (uncredited)
Charles Fallon
Apothecary (uncredited)
Betty Farrington
Frieda (uncredited)
Olaf Hytten
Scotland Yard Radio Operator (uncredited)
William Irving
Policeman Schultz (uncredited)
Charles Lane
Man in Front Row (archive footage)
Eric Mayne
Bidder at Auction (uncredited)
William V. Mong
Fishback (uncredited)
David Newell
Rodrigo (uncredited)
Paul Panzer
Detective (uncredited)
Russ Powell
First Taxi Driver (uncredited)
Adrian Rosley
Pasquale (uncredited)
Ferdinand Schumann-Heink
Policeman Otto (uncredited)
Louise Seidel
Baker's Daughter (uncredited)
Ruthelma Stevens
Fraulein von Elsner (uncredited)
Frederick Sullivan
Romberg (uncredited)
Bernard Suss
Heinrich (uncredited)
Frank Thornton
(uncredited)
Anders Van Haden
Bidder (uncredited)
William Wagner
Coroner (uncredited)
