BBC Sherlock's episode titles inspired by Sir Arthur Conan Doyle's original stories and novels.*A Study in Scarlet -- A Study in Pink *A Scandal in Bohemia -- A Scandal in Belgravia *The Hound of the Baskervilles -- The Hounds of Baskerville *The Adventure of the Empty House -- The Empty Hearse *The Sign of Four -- The Sign of Three *His Last Bow -- His Last Vow (x)