Starts interestingly and then descends into just a more gritty Doctor Who. Too long.Could have been done in a tighter, more impactful way in six episodes. Loses its way and, worst of all, it's completely undermined by Stephen Graham's pathetic attempts to hold down a non-Scouse accent - something he fails miserably to do, therefore demonstrating what an inflexible, one-dimensional and rather poor actor he is.
And when I see an apparently dead character, embraced by his son, blinking, I then know for sure this is really not very well done.