The team realises those responsible for the poisonings have powerful influence; Wagstaffe searches for links between Sofie Cerna and Nick Kyriacou. 46mins
In an investigation of a dead nurse, CCTV shows the victim running from an invisible attacker while DNA is linked to a missing teen presumed dead for years. 46mins
Wagstaffe is frustrated by the victims' family's reluctance to help the investigation proceed as a web of deceit comes unraveled and leads the DI to come to... 48mins
A brilliant detective pursues his career vigorously, but a new string of vicious attacks on never-convicted paedophiles offers a rare challenge. 47mins