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