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.
Sherlock Holmes
Dr. Watson
Irene Frances Adler
Sigmund Freud
Franz Winterhauser
Major Von Bork
Dr. Froelich
Franz Dietrich
Zygovich
Hugo Oberstein
Elliott Ness
Reginald Cholmondley
Michael Simpson-Makepeace
Violet Cholmondley
Margaret Froelich
Franz Zimmer
Franz Hoffman
Serge Duvok
Laszlo Karparti
Stage Door-Keeper
Franz Joseph
Captain Melbury
Mycroft Holmes
Mrs. Hudson
Inspector Schmidt
Eberhardt Bohm