I watched this with fascination last week, and I've just watched tonight's final part, and what a **** ending! I don't get it. What a build up to nothing, or am I missing something? Can someone please tell me what it was supposed to be about. obsession. OK. Got that. But what's the message. And what the hell was that guy doing in the roof? If you can write a great suspense drama you should at least know how to finish one.