The younger brother of the consulting detective tries to steal Sherlock's glory by solving an important case assisted by an eccentric Scotland Yard detective and a lovely but suspicious actress.
In 1891, Queen Victoria has handed over an important document to her Foreign Secretary, Lord Redcliff. The document is soon stolen from his safe. The document getting into the wrong hands could mean the start of war. As such, Queen Victoria personally contacts Sherlock Holmes to recover the document. Knowing exactly what he is doing concerning recovery of the document, Sherlock passes along one of his lesser cases to his younger brother, Sigerson Holmes, who detests his older brother as he believes he is much smarter than his more famous sibling. Regardless, Sigerson takes that case of a woman calling herself Bessie Bellwood, a music hall performer who is being blackmailed. By Sigerson's side is his new assistant, a Scotland Yard records clerk named Orville Stanley Sacker, who has a unique set of talents. Sigerson and Orville's investigation gets them into one predicament after another as they learn the true identity of their client, who has a connection to an opera singer named Eduardo Gambetti, to Lord Redcliff himself, and through association to Professor Moriarty - Sherlock Holmes' arch enemy - who is trying to recovery the Redcliff document himself to sell to the highest bidder.
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).
The film's title and premise are a joke referring to the character of Mycroft Holmes, Sherlock Holmes' older brother, who was by both of their estimates a good deal smarter than Sherlock. He was, however, too lazy to become a detective, and did indispensable work for the British government.
-R.I.P Jerome Silberman (June 11, 1933 – August 29, 2016), known professionally as Gene Wilder, was an American comic actor in film and theater, screenwriter, film director, and author.