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 Adventure of Sherlock Holmes' Smarter Brother on April 4, 2006. The Adventure of Sherlock Holmes' Smarter Brother The Adventure of Sherlock Holmes' Smarter Brother is a 1975 American musical comedy film with Gene Wilder, Marty Feldman, Madeline Kahn, Dom DeLuise, Roy Kinnear and Leo McKern. The film was Wilder's directorial debut, from his own original script. Douglas Wilmer and Thorley Walters appear as Sherlock Holmes and Dr. Watson, respectively. Wilmer had previously appeared as Sherlock Holmes in the 1960s BBC TV series, and Walters played Watson in three other films: "Sherlock Holmes and the Deadly Necklace" (1962), "The Best House in London" (1969), and "Silver Blaze"