This document discusses the thriller genre and its typical codes and conventions. It notes that psychological thrillers, horror thrillers, romantic thrillers, and action thrillers fall under the thriller genre. Successful thrillers, like those by Alfred Hitchcock, build tension through the use of techniques like hints of future events and manipulation of audience emotions. Common thriller conventions include vulnerable protagonists, loner antagonists, use of lighting, location, sound, and editing techniques to create atmosphere and suspense. By employing these typical codes and conventions, filmmakers can signal to audiences that a thriller genre is being used.