Trivia, Quotes, Notes and Allusions
Watson: Elementary, my dear Holmes.
This episode is based on Sir Arthur Conan Doyle's story The Adventure of the Crooked Man, which first appeared in The Strand magazine in July, 1893.
Click here to read the original story.
The end credits for this episode begin with a shot of Henry Wood sitting by a fire and finish with a montage of drawings showing the events of the story.