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Much against his will, Monk (Tony Shalhoub) checks into a hospital to be treated for a bloody nose. His mortal fear of being left alone in a hospital room is only exacerbated when Monk stumbles upon the body of a doctor who has been bludgeoned to death by an oxygen tank. The weapon belongs to an elderly patient who couldn't possibly have arisen from his sickbed to commit the crime, but he's the only suspect the police have. In his efforts to solve the murder, Monk not only learns the true significance of the old adage "physician heal thyself", but also ends up at the mercy of a killer who is fully prepared to "medicate" our hero into the next world. This is the final episode of Monk's fifth season.