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) "Sherlock Holmes" films together, top billing went to Richard Greene, who was the film's romantic lead. Rathbone was billed second. Wendy Barrie, who played Beryl Stapleton, the woman with whom Greene falls in love, received third billing, and Nigel Bruce, the film's Dr. Watson, was billed fourth. In all their other Holmes films, Rathbone and Bruce would receive first and second billing respectively. "The Hound of the Baskervilles" marks the first of the fourteen "Sherlock Holmes" films starring Rathbone and Bruce as Holmes and Watson, respectively. It is also notable as the earliest known "Sherlock Holmes" film to be set