Adaptation

The Adventure of Sherlock Holmes' Smarter Brother

This Film was released on 14 December 1975, by 20th Century Fox.
IMDb: The Adventure of Sherlock Holmes' Smarter Brother 
Letterboxd: The Adventure of Sherlock Holmes' Smarter Brother 

Sherlock Holmes played by: Douglas Wilmer
Dr. Watson played by: Thorley Walters

Turn on <canvas>.
Cast
Douglas Wilmer as Sherlock Holmes
Thorley Walters as Dr. John H. Watson
Leo McKern as Prof. James Moriarty
Wolfe Morris as Frenchman bidding for Redcliff Document
Joseph Behrmannis as Russian bidding for Redcliff Document
George Silver as Bruner
Mel Brooks as Bruner
Kenneth Benda as Butler
Aubrey Morris as Coach Driver
John Brennan as Concert Guest
Tommy Godfrey as Fred
Dom DeLuise as Eduardo Gambetti
Madeline Kahn as Jenny Hill
Gene Wilder as Sigerson Holmes
Nicholas Smith as Hunkston
Albert Finney as Man in Audience at Opera
Julian Orchard as Man in Tails
Roy Kinnear as Moriarty's assistant
John Hollis as Moriarty's gunman
Tony Sympson as Opera Conductor
Stephen Calcutt as Oscar the page
John Le Mesurier as Lord Redcliff
Michael Crane as Renato
Marty Feldman as Sgt. Orville Stanley Sacker
Susan Field as Queen Victoria