I have just finished watching this. What superb work done on these cold cases by the police and forensics. Great tenacity, and viewers complaining that some of it was slow and boring .... well, police work can be slow and boring, having to give great attention to detail and never giving up. I have experience of that.
I find forensics just astonishing these days .... what they can find in minute quantities. Absolutely amazing.
Keith Allen exuded menace all the way through. And at first I really thought he had killed his wife. How terrifying that he had all the kit in the boot of his car ready to strike again. The psychological profile of the man was very accurate.
I thought it was sympathetically written and portrayed, and very well acted. There was no way the murders could have been re-enacted when people are still alive, and I would definitely not have wanted to watch that.
Great sympathy for the son.
And Luke Evans .... well, what can I say? 