On screen
Cast
16 credited performers
Conrad Nagel
Richard Crosby
Leila Hyams
Helen 'Nellie' O'Neill
Margaret Wycherly
Madame Rosalie La Grange
Helene Millard
Mary Eastwood
Holmes Herbert
Sir Roscoe Crosby
Mary Forbes
Lady Alice Crosby
Bela Lugosi
Inspector Delzante
Artwork unavailable
Charles Quatermaine
Dr. Philip Mason
Artwork unavailable
Moon Carroll
Helen Trent
Cyril Chadwick
Brandon Trent
John Davidson
Edward 'Ned' Wales
Artwork unavailable
Bertram Johns
Howard Standish
Artwork unavailable
Gretchen Holland
Grace Standish
Frank Leigh
Professor Feringeea
Clarence Geldart
Commissioner Grimshaw
Lal Chand Mehra
Chotee