The police are still unsure who their killer is, they do however find out the old police team kept secrets.

Cast: Lee Ingleby, Daniel Ryan, Adrian Rawlins, Hermione Norris, Angel Coulby, Nigel Lindsay, Elliot Cowan, Eloise Webb, Tony Gardner, Justin Salinger, Fionn O'Shea, Samuel Edward Cook, Zahra Ahmadi, Hara Yannas, Hannah Britland