The final season brings back the core ensemble that defined the series:
Catherine discovers that her sister Clare (Siobhan Finneran) and Clare's partner Neil (Con O'Neill) have been secretly taking her 16-year-old grandson, Ryan (Rhys Connah), to visit his father, the incarcerated murderer Tommy Lee Royce (James Norton).
This post covers the third season of the BAFTA-winning British crime drama , specifically focusing on the second episode of the final chapter. Episode Overview: Season 3, Episode 2
Catherine tails them to HMP Sheffield in a borrowed truck, eventually confronting Clare in a tense coffee shop standoff that serves as the episode's cliffhanger.