I've been a longtime fan of the Dexter series on Showtime, and a new season (#7) is going to begin in about a month. I unfortunately don't subscribe to Showtime, having caught it through Netflix and Amazon Video on Demand in the past. But last month I picked up the entire run of the whole series (when I spotted it as a blu ray deal of the week on Amazon) and have begun watching it all over again, deliberately, studying this serial killer series for whatever new observations I can make the second time around and to uncover any lessons…