a key item towards the end of the story that reveals the culprit behind the murder to have been his own slave all along. Flashback Flashback, or analepsis, a sudden, vivid reversion to a past event, surprises the reader with previously unknown information that solves a mystery, places a character in a different light, or reveals the reason for a previously inexplicable action. The Alfred Hitchcock film Marnie employed this type of surprise ending. Sometimes this is combined with the above category, as the flashback may reveal the true identity of one of the characters, or that the protagonist is related to one of the villain's past victims, as Sergio Leone did with Charles Bronson's character in Once Upon a Time in the West or Frederick Forsyth's The Odessa File. Cliffhanger A cliffhanger or cliffhanger ending, is a plot device in fiction which features a main character in a precarious or difficult dilemma or confronted with a shocking revelation at the end of an episode of serialized fiction. A cliffhanger is hoped to incentivize the audience to return to see how the characters resolve the dilemma. Unreliable narrator An unreliable narrator twists the ending by revealing, almost always at the end of the narrative, that the narrator has manipulated or fabricated the preceding story, thus forcing the reader to question his or her prior assumptions about the text. This motif is often used within noir fiction and films, notably in the film The Usual Suspects. An unreliable narrator motif was employed by Agatha Christie in The Murder of Roger Ackroyd, a novel that generated much controversy due to critics' contention that it was unfair to trick the reader in such a manipulative manner. Another example of unreliable narration is a character who has been revealed to be insane and thus causes the audience to question the previous narrative; notable examples of this are in the Terry Gilliam film Brazil, Chuck Palahniuk's Fight Club (and David Fincher's film adaptation), Gene Wolfe's novel Book of the New Sun, the second episode of Alfred Hitchcock Presents, Premonition, the 1920 German silent horror film The Cabinet of Dr. Caligari, Iain Pears's An Instance of the Fingerpost, Shutter Island and Kim Newman's Life's Lottery. Peripeteia Peripeteia is a sudden reversal of the protagonist's fortune, whether for good or ill, that emerges naturally from the character's circumstances. Unlike the deus ex machina device, peripeteia must be