A playwright descended from the Borgia family becomes a murder suspect.
as Juan Cesare
as Florence Ballau
as Gerard Lytton
as Victor Ballau
as Inspector Von Brinkner
as Teresa
as Von Stein
as Salvatore
as Lili Salvatore
as Antonio
as Fredericka
as Karl
as Baker
as Auctioneer
as Eric (uncredited)
as Detective (uncredited)
as Servant (uncredited)
as Conductor (uncredited)
as Apothecary (uncredited)
as Frieda (uncredited)
as Scotland Yard Radio Operator (uncredited)
as Policeman Schultz (uncredited)
as Man in Front Row (archive footage)
as Bidder at Auction (uncredited)
as Fishback (uncredited)
as Rodrigo (uncredited)
as Detective (uncredited)
as First Taxi Driver (uncredited)
as Pasquale (uncredited)
as Policeman Otto (uncredited)
as Baker's Daughter (uncredited)
as Fraulein von Elsner (uncredited)
as Romberg (uncredited)
as Heinrich (uncredited)
as (uncredited)
as Bidder (uncredited)
as Coroner (uncredited)
