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.
Bertram Fletcher Robinson collaboration led only to Doyle's celebrated novel, "The Hound of the Baskervilles". Robinson also contributed an idea to the plot of a Sherlock Holmes short-story entitled "The Adventure of the Norwood Builder", which was first published in Collier's Weekly on 31 October 1903. Doyle is sometimes seen as downplaying the importance of Robinson's contribution to "The Hound of the Baskervilles". The literary scholar and critic, Professor William Wallace Robson wrote that it is 'impossible to determine' the precise extent of Robinson's role, but in all probability he merely acted as a 'creative trigger'. He adds that once the element of