"See how medical science SOLVES Europe's most baffling crime"
A playwright descended from the Borgia family becomes a murder suspect.
Robert FloreyDirector
Juan Cesare
Florence Ballau
Gerard Lytton
Victor Ballau
Inspector Von Brinkner
Teresa
Von Stein
Salvatore
Lili Salvatore
Antonio
Fredericka
Karl
Baker
Auctioneer
Eric (uncredited)
Detective (uncredited)
Servant (uncredited)
Conductor (uncredited)
Apothecary (uncredited)
Frieda (uncredited)
Scotland Yard Radio Operator (uncredited)
Policeman Schultz (uncredited)
Man in Front Row (archive footage)
Bidder at Auction (uncredited)
Fishback (uncredited)
Rodrigo (uncredited)
First Taxi Driver (uncredited)
Pasquale (uncredited)
Policeman Otto (uncredited)
Baker's Daughter (uncredited)
Fraulein von Elsner (uncredited)
Romberg (uncredited)
Heinrich (uncredited)
(uncredited)
Bidder (uncredited)
Coroner (uncredited)
Part of
Includes: The White Cockatoo, While the Patient Slept, The Florentine Dagger, Murder by an Aristocrat, The Patient in Room 18, Mystery House
