The document explores four media theorists - Tzvetan Todorov, Vladimir Propp, Claude Levi-Strauss, and Roland Barthes - and their theories on narrative structures. It discusses Tzvetan Todorov's view that narratives follow a structure of equilibrium, disequilibrium, and new equilibrium. It then examines Vladimir Propp's theory that stories contain up to eight character archetypes. Next, it covers Claude Levi-Strauss' idea that narratives revolve around binary opposites. The document analyzes how the theories relate to the films Gangster Squad, Cinderella, Pulp Fiction, and Lock, Stock and Two Smoking Barrels.