The enigmatic series Sherlock retells the tale of England's most celebrated detective, and now Sherlock Holmes and John Watson's adventures in 21st century London are the centrepiece for their own version of the classic mystery game of Cluedo! That darkly charasmatic "Napolean of Crime" Jim Moriarty has been murdered and his body found in London. But who killed Moriarty? Was it Mrs Hudson in the Tower of London with the wrench, or Irene Adler, in 221B with a candlestick?