Sherlock Holmes has retired. But when MacDonald asks him to take on another case, he says yes. There have been some mysterious murders, and there are no visible causes for the deaths. At the same time Holmes gets this case, Graf Udo Von Felseck gives him another case: find a young and missing prince to prevent war between Germany and England. But Von Felseck is not as honest as he seems...
Peter Cushing
as Sherlock Holmes
John Mills
as Dr. John H. Watson / Narrator
Anne Baxter
as Irene Adler / Mrs. Norton
Ray Milland
as Home Secretary
Anton Diffring
as Graf Udo Von Felseck
Gordon Jackson
as Inspector Alec MacDonald
Marcus Gilbert
as Anton Von Felseck
Susan Penhaligon
as Miss Derwent
Jenny Laird
as Mrs. Hudson
Russell Hunter
as Alfred Coombs
James Cossins
as Frederick Bains
Eric Dodson
as Lord Claremont
