Holmes and Watson match wits with an opera star intent on blackmailing a king.
| Actor | Role |
|---|---|
 Eille NorwoodSherlock Holmes | Sherlock Holmes |
 Alfred DraytonKing Wilhelm von Ormstein | King Wilhelm von Ormstein |
 Miles ManderGodfrey Norton | Godfrey Norton |
| HHubert WillisDr. John Watson | Dr. John Watson |
| MMme. d'EsterreMrs. Hudson | Mrs. Hudson |
| JJoan BeverleyIrene Adler | Irene Adler |
| AAnnie EsmondMaid | Maid |