Judge Wargrave is revealed to be the mastermind behind the murders, having carefully planned and executed the deaths of the ten individuals on the island.

The Hound of the Baskervilles is a large, black dog that is said to be the reincarnation of an evil spirit that has haunted the Baskerville family for generations.

The Raven is a talking bird that repeatedly utters the word (Nevermore) and drives the narrator to madness.

Jay Gatsby is a wealthy man who throws lavish parties at his mansion in an attempt to win back the love of his life, Daisy Buchanan.

The Bates Motel is the setting for the film (Psycho), where Norman Bates works and murders his guests.

Amy Dunne is the wife who goes missing on her fifth wedding anniversary, leaving behind a series of clues that suggest she may have been abducted.

Dexter Morgan is a serial killer who works as a blood spatter analyst for the Miami Police Department and uses his skills to hunt down other criminals.

Lisbeth Salander is a hacker who helps journalist Mikael Blomkvist investigate the disappearance of a young woman and uncovers a dark family secret.

Hannibal Lecter is a cannibalistic serial killer who helps FBI agent Clarice Starling catch another serial killer by providing her with psychological insights into the killer's mind.

Holcomb is the small town in Kansas where a family is brutally murdered in their home, and the book follows the investigation and trial of the two men who were convicted of the crime.

Walter White is a high school chemistry teacher who turns to cooking meth to provide for his family after being diagnosed with cancer.

Dr. Sheppard is the narrator of the novel and is revealed to be the murderer at the end, having carefully planned and executed the murder of Roger Ackroyd.

Verbal Kint is the con artist who brings together a group of criminals to pull off a heist and is later revealed to be the mastermind behind the entire operation.

The Priory of Sion is the secret society that is said to be protecting the Holy Grail and is at the center of the mystery in the novel.

The serial killer in the film (Se7en) uses the seven deadly sins as the basis for his murders, targeting individuals who embody each sin.