This really just gets better all the time. The character development of the main protagonists is gently, but effectively carried out, with Michael Kitchen's performance as the quietly calm Superintendent simply outstanding. His ability to convey the full range of emotions, without ever having to resort to shouting or histrionics could be used a Masterclass. Anthony Howell as Det Sgt Paul Milner gives an equally outstanding performance, particularly as he is reduced to a minor character in the first two evidently introductory episodes. Now that the series seems to be hitting its stride, he has progressed from shell-shocked self pity to a nicely judged desperation when faced by his unsympathetic wife. These two main characters are both likeable and plausible and have the ability to gain our sympathies to the extent that the odd plot weakness (notably the final denouement of week 3) can be overlooked. I want to know what happens to them so I do hope there will be a further series.