Sherlock and John investigate the ghosts of a young man who has been seeing monstrous hounds out in the woods where his father died.
Runtime: 88
Starts: Benedict Cumberbatch, Martin Freeman, Una Stubbs, Rupert Graves, Mark Gatiss, Andrew Scott, Russell Tovey, Amelia Bullmore, Clive Mantle, Simon Paisley Day
Director: Paul McGuigan