In a shocking twist, Dr. Sheppard, the narrator of the story, is revealed to be the murderer of Roger Ackroyd.

Amy Dunne, the missing wife, is revealed to have meticulously planned her own disappearance to frame her husband for her murder.

In a stunning twist, Verbal Kint, the seemingly harmless and unreliable narrator, is revealed to be the mastermind criminal Keyser Soze.

The shocking twist in 'The Sixth Sense' is that Malcolm Crowe, the child psychologist, is actually a ghost who is unaware of his own death.

In a mind-bending twist, it is revealed that the Narrator and Tyler Durden are two different personalities of the same individual.

The twist in 'Memento' is that Leonard Shelby suffers from anterograde amnesia, which prevents him from forming new memories.

The shocking twist in 'The Prestige' is that the two rival magicians, Robert Angier and Alfred Borden, are actually the same person.

The twist in 'Shutter Island' is that Teddy Daniels, the U.S. Marshal investigating the disappearance of a patient from a mental institution, is actually a patient himself.

The shocking twist in 'Psycho' is that Norman Bates, the seemingly harmless motel owner, is a transvestite and a serial killer with a split personality.

The twist in 'The Girl with the Dragon Tattoo' is that Lisbeth Salander, the young and enigmatic hacker, is also a tattoo artist, a private investigator, and a victim of sexual abuse.

The twist in 'Inception' is that there are multiple dream levels, and the characters can move between them using a shared dream device.

The twist in 'The Others' is that the family is actually dead and living in a haunted house, unaware of their own demise.

The twist in 'The Crying Game' is that Fergus, the IRA member who befriends a British soldier, is revealed to be a transvestite.

The twist in 'The Handmaiden' is that Sook-hee, the handmaiden, and Hideko, the wealthy heiress, are both con artists working together to deceive a wealthy count.

The twist in 'Parasite' is that the Kim family, who initially appear to be struggling for survival, are all hiding secrets and are involved in a complex scheme to deceive a wealthy family.