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
