David grows closer to his children, the police still have trouble finding out who's the killer but there is more trouble on the way.

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