Cast
Holmes Herbert
Sir Roscoe Crosby
Bela Lugosi
Inspector Delzante
John Davidson
Edward 'Ned' Wales
Clarence Geldart
Commissioner Grimshaw
Margaret Wycherly
Madame Rosalie La Grange
Mary Forbes
Lady Alice Crosby
Cyril Chadwick
Brandon Trent
Frank Leigh
Professor Feringeea
Lal Chand Mehra
Chotee
Helene Millard
Mary Eastwood
Conrad Nagel
Richard Crosby
Leila Hyams
Helen 'Nellie' O'Neill