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The Adventure of Sherlock Holmes' Smarter Brother: Gene Wilder plays Sherlock Holmes' younger brother who is annoyed that he has had to live in Sherlock's shadow for so long. When Sherlock goes to the continent, he sends a case to his brother who constantly tries with varying success, to imitate Sherlock's deductive and observational tricks.

How to Watch The Adventure of Sherlock Holmes' Smarter Brother Legally and Safely

If you want to stream The Adventure of Sherlock Holmes' Smarter Brother through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry The Adventure of Sherlock Holmes' Smarter Brother films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.