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 (1939 film) local naturalist. Meanwhile, a homicidal maniac (Nigel De Brulier), escaped from Dartmoor Prison, lurks on the moor. Holmes eventually makes an appearance, having been hiding in the vicinity for some time making his own investigation. An effective scene, not in the original book, occurs when Watson and Sir Henry attend a seance held by Mrs. Mortimer (Beryl Mercer). In a trance, she asks, "What happened that night on the moor, Sir Charles?" The only reply is a lone howl, possibly from a hound. After some clever deception by Holmes, he surmises that the true criminal is Stapleton, a long-lost cousin