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 (1977). Plot In 1891, Foreign Secretary Lord Redcliff haphazardly receives a document from Queen Victoria; the document is stolen from his safe later that night. Sherlock Holmes and Dr. Watson discuss the case. Deciding to lie low for a while, Holmes informs Watson that he will delegate cases to his younger brother, Sigerson, who has toiled in his brother's shadow without credit for decades. At a railway station, Holmes passes the message to Scotland Yard records clerk Orville Sacker. Arriving at Sigerson's flat, Sacker finds him practicing his fencing and swordplay. Sigerson expresses bitterness and resentment over being unable to replicate Sherlock's success, mocking his big brother as "Sheer Luck" Holmes. Arriving next is a woman claiming to be Bessie Bellwood, but who is really Jenny Hill, a music hall singer who believes she is being blackmailed by opera singer Eduardo Gambetti over a lewd letter she sent him. Sigerson attends one of Hill's performances and twice saves her from attempts on her life. The next day, he seduces her in her dressing room. She reveals that she stole the document from Redcliff's safe and claims that Redcliff is her father. When Sigerson meets with Redcliff, he learns that Hill is in fact Redcliff's fiancée. The trail leads to Gambetti, who has made a deal with criminal mastermind Professor Moriarty to sell him the document, which foreign powers have offered £50,000 to acquire. Moriarty pays, but the distrustful Gambetti proposes that he hand over the document during the debut of his opera so that he has time to deposit the money. Sigerson and Sacker infiltrate the opera, which soon devolves into chaos. Sigerson and Moriarty confront each other backstage and are drawn into a sword fight that corners Sigerson on an outside ledge. Under threat of death, Sigerson agrees to hand over what Moriarty thinks is the document before the chimes