Catherine Cooke
В роли: Self - Curator - Sherlock Holmes Collection Marylebone Library

Owen Dudley Edwards
В роли: Self - Conan Doyle Biographer

Roger Johnson
В роли: Self - BSI / Editor: Sherlock Holmes Journal

Richard Jones
В роли: Self - Presenter / Writer, Broadcaster

Alan Mackaill
В роли: Self - The Royal College of Surgeons, Edinburgh (как Dr Alan Mackaill)