Getting used to the characters by now. This was a 2-parter that unfolded slowly with a few vital clues coming late in the concluding portion, but not 'out-of-the-blue' like an Agatha Christie mystery! I actually re-watched part 2 again the next day to see why it took me so long to figure it out. Yeah, I missed a few things, but the irony is that our fav forensic psychologist missed them, too.
Perfect plot development from Part 1 to 2, great performances by all, including the supporting cast, and not too nasty to watch, although there are bodies. ( It is a show about serial killers, after all, although some are upstart). Hermione Jordan as Carol (Homicide Officer) and Robson Green as Dr Tony Hill are off the charts good.
This one is 10/10.