The Master Blackmailer
Sherlock Holmes
Dr. John Watson
Charles Augustus Milverton
Lady Diana Swinstead
The dowager
Inspector Lestrade
Lady Eva Blackwell
Mrs Hudson
Agatha
Bertrand
The Hon. Charlotte Miles
Colonel Dorking
Harry, Earl of Dovercourt
Hebworth (Alias Veitch)
Stokes
Lillie
Daphne
Tronson, The Butler
Lewis, Dorking's Batman
Art Gallery Owner
Hobbs, The Painter
Auctioneer
Emile
Cabaret Artiste
