"A playwright descended from the Borgia family becomes a murder suspect."
Donald Woods
as Juan Cesare
Margaret Lindsay
as Florence Ballau
C. Aubrey Smith
as Gerard Lytton
Henry O'Neill
as Victor Ballau
Robert Barrat
as Inspector Von Brinkner
Florence Fair
as Teresa
Frank Reicher
as Von Stein
Charles Judels
as Salvatore
Rafaela Ottiano
as Lili Salvatore
Paul Porcasi
as Antonio
Eily Malyon
as Fredericka
Egon Brecher
as Karl
Herman Bing
as Baker
Henry Kolker
as Auctioneer
Barlowe Borland
as Eric (uncredited)
Glen Cavender
as Detective (uncredited)
Wheaton Chambers
as Servant (uncredited)
Carlos De Valdez
as Conductor (uncredited)
Charles Fallon
as Apothecary (uncredited)
Betty Farrington
as Frieda (uncredited)
Olaf Hytten
as Scotland Yard Radio Operator (uncredited)
William Irving
as Policeman Schultz (uncredited)
Charles Lane
as Man in Front Row (archive footage)
Eric Mayne
as Bidder at Auction (uncredited)
William V. Mong
as Fishback (uncredited)
David Newell
as Rodrigo (uncredited)
Paul Panzer
Russ Powell
as First Taxi Driver (uncredited)
Adrian Rosley
as Pasquale (uncredited)
Ferdinand Schumann-Heink
as Policeman Otto (uncredited)
Louise Seidel
as Baker's Daughter (uncredited)
Ruthelma Stevens
as Fraulein von Elsner (uncredited)
Frederick Sullivan
as Romberg (uncredited)
Bernard Suss
as Heinrich (uncredited)
Frank Thornton
as (uncredited)
Anders Van Haden
as Bidder (uncredited)
William Wagner
as Coroner (uncredited)
Robert Florey
Director
Thomas Pratt
Editor
Tom Reed
Screenplay
Arthur L. Todd
Director of Photography
Orry-Kelly
Costume Design
Brown Holmes
Additional Dialogue
Carl Jules Weyl
Art Direction
Leo F. Forbstein
Music Director
Arthur Greville Collins
Dialogue
Anton Grot
Ben Hecht
Writer
