Catherine Cawood is the sergeant on duty when flustered and nervous accountant Kevin Weatherill comes into her West Yorkshire station to report a crime.
Sarah Lancashire / Siobhan Finneran / Charlie Murphy / James Norton / Rhys Connah / Shane Zaza / Rick Warden / George Costigan / Karl Davies / Ishia Bennison / Jill Baker / Joe Armstrong / Steve Pemberton / Adam Long / Derek Riddell / Julia Ford / Craig Thomas Lambert
Catherine races to protect her family as a murder investigation begins.
As Tommy's big day approaches, Catherine becomes suspicious, and Ryan finds a new way to defy her.
Catherine confronts Clare and presents Ryan with an ultimatum. Faisal and Joanna hatch a plan that takes an unexpected turn.
Catherine learns of a painful betrayal close to home, and Faisal comes under increasing pressure from all sides.
When Catherine discovers the remains of a murder victim, it bizarrely leads her straight back to Tommy Lee Royce.