Sherlock Holmes and Doctor Watson get involved with Balkan terrorists to save Emperor Franz Joseph I of Austria from an assassination at the opera house and prevent World War I.

Top Cast

Christopher LeeSherlock Holmes

Patrick MacneeDr. Watson

Morgan FairchildIrene Frances Adler

John BennettSigmund Freud

Michael SiberryFranz Winterhauser

Dominic JephcottMajor Von Bork

Frank MiddlemassDr. Froelich

James BreeFranz Dietrich