All Cast
Basil Rathbone
Sherlock Holmes
Nigel Bruce
Doctor Watson
Dennis Hoey
Inspector Lestrade
Hillary Brooke
Sally Musgrave
Mary Gordon
Mrs. Hudson
Halliwell Hobbes
Alfred Brunton, the butler
Milburn Stone
Capt. Pat Vickery
Minna Phillips
Mrs. Howells
Arthur Margetson
Dr. Bob Sexton
Gavin Muir
Phillip Musgrave
Frederick Worlock
Geoffrey Musgrave
Norma Varden
Gracie the Barmaid
Peter Lawford
Young Sailor at Bar
Heather Wilde
Olaf Hytten
Captain MacIntosh