The Thirteenth Chair

Richard Crosby

Helen 'Nellie' O'Neill

Madame Rosalie La Grange

Mary Eastwood

Sir Roscoe Crosby

Lady Alice Crosby

Inspector Delzante

Dr. Philip Mason

Helen Trent

Brandon Trent

Edward 'Ned' Wales

Howard Standish

Grace Standish

Professor Feringeea

Commissioner Grimshaw

Chotee