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.

• Silvio Berlusconi Communications
• Harmony Gold
• Christopher Lee
• Patrick Macnee
• Morgan Fairchild
• John Bennett
• Michael Siberry
• Dominic Jephcott
• Frank Middlemass
• James Bree