Psychological thrillers focus on the psychology of characters rather than plot, with themes of reality, perception, identity and death. Typical settings include old abandoned houses, hospitals, and forests where characters are isolated and battling their own minds. Iconography in these films, like knives, confined spaces and shadows, provide symbolic meaning and clues that psychological elements are involved. Examples given are the television shows Hannibal and Dexter, video games Heavy Rain and Alan Wake, and movies Black Swan, Shutter Island, Se7en, The Shining, and The Silence of the Lambs.