The Hounds of Baskerville order to test his theory. He also points out Sherlock was wrong for once; he believed the drug was in Henry's sugar and put it in John's coffee. In the closing scenes, Mycroft oversees the release of Jim Moriarty (Andrew Scott) from a holding cell in which he has written Sherlock's name all over the walls. The story is based on Arthur Conan Doyle's novel "The Hound of the Baskervilles", and also contains plot devices and lines from other Doyle stories: In June 2011, it was announced that Russell Tovey would appear in "Sherlock" series two in its second episode.
The Hound of the Baskervilles Laura Lyons to get her cooperation. They hear a scream and discover the body of Selden, dead from a fall. They initially mistake him for Sir Henry, whose old clothes he was wearing. At Baskerville Hall, Holmes notices a resemblance between Stapleton and a portrait of Hugo Baskerville. He realises that Stapleton could be an unknown Baskerville family member, seeking to claim the Baskerville wealth by eliminating his relatives. Accompanied by Inspector Lestrade, whom Holmes has summoned, Holmes and Watson travel to the Stapleton home, where Sir Henry is dining. They rescue him from a hound that Stapleton releases while