Sherlock Holmes
Doctor Watson
Kitty
Sir Evan Barham
R.F. Meade
Sir Anthony Lloyd
General Jerome Lawford
Admiral Sir John Fabian Prentiss
Captain Roland Shore
Mrs. Hudson
Jill Grandis
Camberwell
Smithson - Barham's Butler (uncredited)
Meade's Henchman (uncredited)
BBC Radio Announcer (voice) (uncredited)
Voice of Terror (voice) (uncredited)
Bar Patron (uncredited)
