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 (1959 film) Watson did. They find out that Selden, who is actually Barrymore's brother-in-law, was the one signaling with the light, and that Barrymore and his wife were the ones returning the signal. The hound has mistakenly killed Selden because Selden was wearing Sir Henry's clothes, given to him by his sister, Barrymore's wife (Helen Goss). Holmes then questions Bishop Frankland about a tarantula missing from the bishop's collection, and deduces that it may have been the same one encountered in London. Holmes is almost trapped inside the old tin mine while investigating. By now, Holmes has solved the case: The Stapletons