disclaimer i do not own Sherlock and John are contacted by Henry Knight (Russell Tovey), a man plagued by the traumatic memories of the death of his father at the hands of a monstrous hound on Dartmoor years before. Investigating Dewer's Hollow, a local spot where the beast was allegedly seen, as well as the nearby Ministry of Defence testing site Baskerville, Holmes and Watson uncover a conspiracy wherein one of the Baskerville scientists, Dr. Frankland (Clive Mantle), is continuing the work of H.O.U.N.D., an aborted project to create a hallucinogenic gas for military use. Holmes and Watson discover that the legendary hound is an ordinary dog used for publicity that the hallucinogenic gas makes appear as a demonic monster. The 'hound' that killed Henry's father was actually Frankland wearing a red-lensed gas mask and a T-shirt bearing the logo of the H.O.U.N.D. group. Confronting both the dog and Frankland at Dewer's Hollow, Watson and Lestrade shoot the dog. Frankland attempts to flee but dies while trying to do so as he runs into a minefield. In the final scene, Mycroft releases a confined Jim Moriarty.
