Watching "Bancroft". It's a British cop/thriller/drama. Rather good. The basic gist is that a young detective is put in charge of cold cases. One of her superiors - Bancroft who is a competent, effective and ambitious detective of probably a generation older than the young detective is actually (no secrets to this as it is early revealed), well Bancroft is the one who killed the victim in the cold case. Years earlier when she was herself was new to the police force.
It's making for some really good cat and mouse scenes. The acting is pretty good too with both female leads just organically fitting into their roles beautifully.