Holmes is approached by Percy Phelps, of the Foreign Office, to recover a document which has been stolen - before it can cause an international scandal and ruin Phelps's career. It seems the British Empire and the Kingdom of Italy have entered into a secret and embarrassing treaty.

• Arthur Conan Doyle
• John Hawkesworth
• Michael Cox

• Sophie Thompson
• Denys Hawthorne
• Vernon Dobtcheff