The Sign of Fear

London, 1917: Terror has come from the sky, and Londoners are scurrying in fear. A twin tragedy strikes Dr John Watson: an old friend, Staff Nurse Jennings, is on a boat-ambulance torpedoed in the Channel with no survivors. And his concert-going companion, Sir Gilbert Hastings, is kidnapped. Then comes a gruesome ransom demand, for Sir Gilbert and four others, which will involve terrible mutilation unless the terms are met. With his old companion Sherlock Holmes otherwise indisposed, Dr Watson is on his own in a race against time...