Mme. Rosalie La Grange (as Dame May Whitty)
Nell O'Neill
Inspector Marney
Helen Trent
Dick Crosby
John Wales
Lady Crosby
Lionel Trent
Sir Roscoe Crosby
Mary Eastwood
Dr. Mason
Stanby
Miss Stanby
Professor Feringeea
Constable
Chotee
Commissioner Grimshaw (uncredited)