The document discusses several narrative theories and their application to teen slasher films. It describes Vladimir Propp's characterization of 8 character types and 31 narrative functions but notes this theory is difficult to apply to teen slashers, which lack generic heroes. Torodov's narrative structure of equilibrium, disruption, recognition, repair and new equilibrium is also challenging to apply as teen slashers don't have happy endings. However, Levi-Strauss' concept of binary oppositions around themes like good vs evil can be easily applied. Additionally, Roland Barthes' idea of enigma codes, where mysteries are unsolved until the end, is clearly demonstrated in films like Scream by the unknown killer's identity.