Further examination of David Walker's history suggests that he was a troubled man with a number of issues. Marion has a prickly chat with Cassie about her past and the investigation reveals her close relationship with an IRA activist. As the police enquiries encroach on their lives, Sara and Colin open up to their partners.
Elenco: Nicola Walker , Sanjeev Bhaskar , Sanjeev Bhaskar , Trevor Eve , Lewis Reeves , Jordan Long .