Something terrible has happened to Henry Knight; Sherlock and John investigate the truth about the monstrous creature which apparently killed their client's father. A hound from hell? What seems like fantasy in Baker Street is a very different prospect in the ultra-secret army base that looms over Dartmoor.
Stars: Benedict Cumberbatch, Martin Freeman, Una Stubbs
Director(s): Mark Gatiss, Arthur Conan Doyle
Writer(s): Mark Gatiss, Arthur Conan Doyle
Genres: Crime,Drama,Mystery,Thriller