You've probably seen a lot about this series already over on t'other channels, so here's your chance to catch it from the very start. Starring Sarah Lancashire in what's undoubtedly been a career changing role, it follows the story of small town police sergeant called Catherine Cawood whose world is rocked when the man who killed her daughter is freed. On top of that, she must deal with the heavy duty challenges that arise from policing a town that is full of drug addicts, drunks and pregnant teenagers.