This document discusses the key conventions of film noir including character roles, narrative themes, iconography and mise en scene, and technical conventions. It describes the main character roles as cynical protagonists, femme fatales who manipulate men, and corrupt authority figures. The narrative themes include mistrust, paranoia, bleakness, and reflections on the effects of war and the Cold War. Iconography features elements like dark streets, neon signs, guns, and alcohol representing the corrupt urban environment. Technical conventions discussed are low-key lighting, voiceovers, shadows, and nonlinear narratives.