Roy William Neill Director Basil Rathbone Sherlock Holmes Actor Nigel Bruce Doctor Watson Actor Hillary Brooke Sally Musgrave Actor Milburn Stone Captain Pat Vickery Actor Arthur Margetson Doctor Bob Sexton Actor Halliwell Hobbes Alfred Brunton Actor Dennis Hoey Inspector Lestrade Actor Minna Phillips Mrs. Howells Actor Gavin Muir Phillip Musgrave Actor Gerald Hamer Major Langford Actor Vernon Downing Lt. Clavering Actor Olaf Hytten Captain MacIntosh Actor Frederick Worlock Geoffrey Musgrave Actor Harold De Becker Pub Proprietor Actor Mary Gordon Mrs. Hudson Actor Norma Varden Gracie Actor Eric Snowdon Sailor Trying to Play Piano Actor Peter Lawford Young Sailor at Bar Actor Joan Blair Nora Actor Heather Wilde Jenny Actor Charles Coleman Constable Actor Martin Ashe Slinking Figure Actor Howard Benedict Producer Bertram Millhauser Screenwriter Charles Van Enger Cinematographer Fred R. Feitshans Jr. Film Editing John B. Goodman Art Director Harold H. MacArthur Art Director Edward R. Robinson Set Decoration Russell A. Gausman Set Decoration