The detective dénouement is a variant on the literary dénouement common to mystery stories. It was first popularised by the Sherlock Holmes novels, but is present in many stories, such as the works of Agatha Christie or in Ellen Raskin's young adult novel The Westing Game.

In detective stories, the dénouement is the segment of a mystery novel in which the protagonist of the story, or a character serving in his or her stead, reveals all of the clues and lays out the conclusion for the other characters. This is usually in an attempt to show the readers how the character came to the conclusion and figured out the mystery. Some readers enjoy the detective dénouement while others find it annoying, claiming that it makes them feel that the author doesn’t feel that they can figure out the mystery on their own. One famous example of the detective dénouement is the explanatory speech given by a forensic pyschologist after the climax of the 1960 film Psycho.

In the TV show Monk, Adrian Monk often uses this method using the words "here's what happened." A black-and-white montage of the events prior to the murder accompanies his narration.

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