I agree with everything Geordie 101 said. It started quite slowly and in a slightly confusing manner, but that's good. It makes the viewer sit up and pay attention. Really good performances from everyone especially Glenister and the actor who played his younger character. It was marvellous to see 'Coaches' from Gavin and Stacey play such a prominent part and the chemistry between him and Glenister was palpable. I was a young woman working with the police in the 70s and their portrayal of the CID officers in particular was spot on. This is a dramatisation of real events where people really were murdered. I think the tone was perfect. I've just read a review by the The Telegraph where is was described as 4hrs of turgid viewing. Ignore that. Watch it. It's a tremendous piece of drama retelling true life events.
