(Update 2015-06-15: I've watched all of the first three episodes, and most of episode four. While I'm still panning the series, the documentary is definitely worth a peek. But why not read Robert Keppel's books instead? They're terrific.)
I've seen probably every movie about the Antagonist -- I won't give his name, even though you should already know it -- and I've read many books as well. Furthermore, I'm a big fan of Dr. Robert Keppel's books, and they are incredibly insightful. I've also read the most famous book on this subject -- I won't name that either to avoid a spoiler -- and while I liked it, it still had some flaws. So, I was really looking forward to this mini-series.
I will say immediately that I do like the actor's portrayal of Dr. Keppel. I don't know the ex-detective/current professor personally, but I've seen many interviews with him. And I believe that the actor plays this role quite well; he seems to nail many of the subtle mannerisms of Dr. Keppel. Is this actor really like the man he is playing, though? Well, you'd have to ask someone who knows the professor personally, I suppose.
But the actor playing the Antagonist? Really? He absolutely strangles any life from the real-life killer, to risk offense. This actor neither looks nor acts like the real Antagonist, and for the life of me, I do not understand what the casting director was thinking. Ok, maybe I do.
The Antagonist was considered to be quite charming, and quite handsome. Supposedly, over time, people's opinion about beauty changes, although I think that it is strictly socialization. So our character here maybe fits modern-day opinion of what makes a man desirable; once again, you'd have to ask someone else on this one. But I often complain when an actor looks too much like the person he's playing; it can be distracting. But here, it's completely the opposite; this guy looks NOTHING like the Antagonist! What a huge misfire!
This story needs to be told in a mini-series, as there is so much information, so the producers get this part right. But so much time is wasted here on information that is unnecessary. I think the writer wanted to throw out red herrings to build suspense, but you know, sometimes a red herring is strictly a red herring. And sometimes, a red herring just stinks.
Big disappointment for me on a movie that could be terrific, even if making another film about the Antagonist could be considered overkill. Go watch the other movie instead, or even that other one, to again avoid any spoilers. But I'll give you one spoiler that should help: this mini-series smells like milk that's one month past its pull date. I'd just dump it from my WatchList if I were you, right down the drain.