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It was the sitcom analogue to Conan Doyle’s “the trick,” the term for when Sherlock Holmes would dazzle Dr. Watson by telling him everything about someone just by looking at their walking stick.

Introducing his villain at the start of each series is another modern shift; Conan Doyle saved him for what he believed would be the end of his journey with Holmes.

A cultured breed distinct from the hard-boiled native brand, its king and queen are Arthur Conan Doyle and Agatha Christie, as it is almost impossible not to know.

British author Arthur Conan Doyle, the creator of Sherlock Holmes, called it “the most terrible August in the history of the world.”

In case it wasn’t clear, dire second-act number “I Owe it All” lays out the show’s inspirations: Agatha Christie, Arthur Conan Doyle, Wilkie Collins, Erle Stanley Gardner.