[6] You can’t say Kevin Costner doesn’t swing for the fences, even if the results aren’t always as celebrated as Dances with Wolves. In this three-hour post-apocalyptic epic, Costner both directs and stars as the title character, a nomad who assumes the identity of a deceased postal carrier. Why would he do that? Well, in post-apocalyptic America, there is no government, not much electricity, no …