Cast Principale
Basil Rathbone
Philo Vance
Leila Hyams
Belle Dillard
Roland Young
Sigurd 'Erik' Arnesson
Alec B. Francis
Professor Bertrand Dillard
George F. Marion
Adolph Drukker
Nessuna foto
Zelda Sears
Mrs. Otto Drukker
Bodil Rosing
Grete Menzel
Carroll Nye
John E. Sprigg
Nessuna foto
Charles Quatermaine
John Pardee (as Charles Quartermaine)
James Donlan
Ernest Heath
Sidney Bracey
Pyne (as Sydney Bracey)
Clarence Geldart
John F.-X. Markham
