Robert is unwittingly involved in the pursuit of a dangerous criminal gang, in which Donna must think quickly to save the day. However, personal ramifications threaten to jeopardise the job she loves. Meanwhile, Carl is given a disturbing insight into his boss’s personal life when he and Felix investigate the disappearance of a teenage girl. But when Carl returns home, his wife has an even bigger surprise in store for him. Police drama, starring Ashley Walters, Jacob Ifan, Amanda Abbington and Shaun Dooley.