The document discusses potential filming locations for an opening sequence involving flashbacks. It will primarily be shot at a train station, but will also require locations for two flashback scenes - the interior of a house and a shot of a hand grabbing a bottle from a pavement. Three train stations are considered as options, with Leicester station selected for its isolated area. Two houses and the document writer's school are also considered for the argument scene, with the school selected for its long, confined corridor.