This is about the worst British TV police drama we've ever watched. Very poor unbelievable script, with many inaccuracies and inconsistencies. Ffion seemed too young to be a DI when her ex Rick was still only a DS. Highly implausible that in a largish South Wales town both of them and their families had personal connections to the various suspects and victims. Also, given these personal connections, unlikely that investigating officers would be allowed to continue on the case. One of the early suspects was remanded in custody in a prison locally and, while there, was approached by the long serving convict Paul. Unlikely that remand prisoners would be mixed in with old lags. Then in a later episode Rick and Ffion travel several hours to visit Paul in prison in Worcestershire. That does not gel with Paul's prior talking face to face to the remand bloke. Rick confesses to the DCI boss that in the old case he had persuaded a witness to give false evidence. He would not have just been stood down; he'd have been charged with perverting the course of justice. Pathetic really. God knows why we persisted with it.