This document defines and analyzes the film noir genre. It discusses key themes like corruption and justice that are common in film noir. It originated after WWII, influenced by German expressionism and crime novels. Film noir uses iconography like venetian blinds and features morally ambiguous protagonists. It employs techniques like low-key lighting, Dutch angles, and flashbacks to create a mood of pessimism. Settings are usually dark urban areas and costumes reflect the 1940s-50s era. While originally for mature audiences, the genre has evolved over time into neo-noir films and graphic novel adaptations.