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

Béla Lugosi

Inspector Delzante

Charles Quatermaine

Dr. Philip Mason

Moon Carroll

Helen Trent

Cyril Chadwick

Brandon Trent

John Davidson

Edward 'Ned' Wales

Bertram Johns

Howard Standish

Gretchen Holland

Grace Standish

Frank Leigh

Professor Feringeea

Clarence Geldart

Commissioner Grimshaw

Lal Chand Mehra

Chotee