as Inspector Brockett
as Fairbrother
as Sir Arthur Conan Doyle
as Charley
as Peter Thomas
as William Strahan
as Sergeant
as Squire
as Det Insp Bead
as Harry S. Bloomburger
as Dr. Friendman
as Sinclair
as Sir George Crofts
as James Johns
as Queen's Counsel
as Narrator
as Superintendent Carson
as Granville Bennett
as Chief Superintendent Strange
as Supt. Cramer
as Kolmaar
as Petroc
as George Bunn
as Catesby / Ely (voice)
as Major Hawkins
as Jonas Bradlaw
as Inspector
as Mr. McAllister
as Sam McGuire
as Mr. Spenlow
as Superintendent Rafferty
as Det. Sgt. Evans
as Robert Koch
