May 22nd is Sherlock Holmes Day. Sir Arthur Conan Doyle, creator of Sherlock Holmes, wrote a total of 56 short stories and four novels about the character, most of which are told from the perspective of Dr. Watson.
Fun fact: Contrary to popular belief, in those stories, Holmes never utters the phrase "Elementary, my dear Watson," though he does occasionally say similar things and use portions of the phrase. He was also not described wearing his iconic deerstalker hat—though that image has become so thoroughly entwined with the character since then that it can be seen in most depictions of him, including a statue at the London Baker Street Station (pictured above).
There's a knock on your door. Upon opening it, you find yourself facing a man dressed distinctly like Sherlock Holmes. He informs you that he is a detective, and that you are a suspect in the disappearance of a person named John Watson. What happens next?