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The Grand Experiment - S2-E24

Trivia: When Mycroft mentions a conversation between Sherlock and their father that he once overheard, the content of said conversation is how Sherlock describes Mycroft to Watson in "The Adventure of the Greek Interpreter."

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The Hound of the Cancer Cells - S2-E18

Trivia: "The Hound of the Cancer Cells" is a loose reference to "The Hound of the Baskervilles", perhaps the most famous of the four Sherlock Holmes novels.

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Season 2 generally

Trivia: Sherlock's brother Mycroft has an international franchise of restaurants called Diogenes. This is a reference to the Diogenes Club, the gentleman's club Mycroft co-founded in the Holmes short stories.

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