The Adventure of the Greek Interpreter Sherlock Holmes, far from being a one-off in terms of his powers of observation and deductive reasoning, in fact has an elder brother whose skills, or so Holmes claims, outstrip even his own. As a consequence of this, Watson becomes acquainted with the Diogenes Club and his friend's brother, Mycroft. Mycroft, as Watson learns, does not have the energy of his younger brother and as a consequence is incapable of using his great skills for detective work: In spite of his inertia, the elder Holmes has often delivered the correct answer to a problem that Sherlock has brought to him.
The Hounds of Baskerville The Hounds of Baskerville "The Hounds of Baskerville" is the second episode of the second series of the BBC crime drama series "Sherlock", which follows the modern-day adventures of Sherlock Holmes, and was first broadcast by BBC One on 8 January 2012. It was written by co-creator Mark Gatiss, who also portrays Mycroft Holmes, Sherlock's brother in the series, and was directed by Paul McGuigan. The episode is a contemporary adaptation of "The Hound of the Baskervilles", one of Sir Arthur Conan Doyle's most famous works. In the episode, Sherlock (Benedict Cumberbatch) and his crime-solving partner John Watson (Martin Freeman)