This document discusses the genre of film noir. It provides descriptions of some classic film noir movies from the 1940s-1950s and notes their dark, psychological themes of betrayal, madness, and moral corruption. It then outlines some of the key conventions of film noir, including the gloomy, pessimistic mood; morally ambiguous protagonists like detectives and criminals; and femme fatale female characters. It also describes the visual style of film noir, including expressionistic lighting, disorienting camera work, and dark, shadowy urban settings.