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 (1978 film) on the moor. In the next scene, while wandering on the moors, Watson happens upon Mr. Stapleton (Denholm Elliott), who mistakes him for Sir Henry. Stapleton's sister (Joan Greenwood) describes dramatically her encounter with the Hound on the moor, suggesting that it ravished her, whereupon she attempts to force herself upon the reluctant Watson, with Miss Stapleton undergoing supernatural transformations reminiscent of The Exorcist. The Barrymores (Max Wall and Irene Handl) at Baskerville Hall mistreat Sir Henry and Watson, feeding them only cheese and water and then throwing them into a small bedroom, ankle-deep in water. Watson then goes to