The Thirteenth Chair

Conrad Nagel

as Richard Crosby

Leila Hyams

as Helen 'Nellie' O'Neill

Margaret Wycherly

as Madame Rosalie La Grange

Helene Millard

as Mary Eastwood

Holmes Herbert

as Sir Roscoe Crosby

Mary Forbes

as Lady Alice Crosby

Lugosi Béla

as Inspector Delzante

Charles Quatermaine

as Dr. Philip Mason

Moon Carroll

as Helen Trent

Cyril Chadwick

as Brandon Trent

John Davidson

as Edward 'Ned' Wales

Bertram Johns

as Howard Standish

Gretchen Holland

as Grace Standish

Frank Leigh

as Professor Feringeea

Clarence Geldart

as Commissioner Grimshaw

Lal Chand Mehra

as Chotee