It certainly is worth a better score than it has at present. Script and acting are both good. It is complex enough with several stories going at once. There are a range of characters who inhabit the story and who require some concentration to unravel their roles. It is about people's intertwining lives and how people in powerful positions are able to divert justice to protect their secrets. It is about good and evil and innocence and guilt. It is about parents and children and the power of relationships and the need that is intrinsic in human nature. There is mystery and suspense which drives the characters and story along. In my opinion, it is worth at least an eight. The English know how to deliver a suspenseful series and they excel at keeping the momentum going.