Trivia / The Adventure of Sherlock Holmes' Smarter Brother

  • Actor Allusion:
    • Sherlock Holmes and Dr. Watson are both played by actors who had played the roles in other productions; Douglas Wilmer had played Sherlock in the first series of The BBC's Sherlock Holmes from 1964-65 (with Nigel Stock as Watson), while Thorley Walters had played Watson in the 1962 film Sherlock Holmes and the Deadly Necklace (with Christopher Lee as Sherlock).
    • Roy Kinnear is cast as an abused and browbeaten villain who Gene Wilder constantly outwits, similar to his role in Willy Wonka and the Chocolate Factory.
  • The Cast Showoff:
    • Madeline Kahn singing opera; Dom DeLuise is a case of Irony as She Is Cast.
    • Wilder was an accomplished college fencer and gets to show off his swordfighting skill in this film.