I should have suspected that this behavior was not just limited to unfinished stories in print (I sometimes won't move from my spot for hours as I try to save a character by reading quickly through their peril. And there was the time I called in sick to work because the Hogwarts gang was in all sorts of trouble that I hadn't read them through by sunrise). Seems as though I am not okay with an unfinished story on screen either.
The Russian, Salty and I watched part 2 tonight. If I hadn't fought to keep my eyes open through that one (sleepy day!), I'd probably be down on the couch right now watching part 3!