Thomas Lockyer

Tension mounts as DCI Gene Hunt and his team are investigating a diamond heist following the murder of three London gang members. However, DI Alex Drake is distracted and, with encouragement from DCI Jim Keats, she decides to pursue her own investigation to the bitter end - did Gene Hunt murder Sam Tyler? It is time for Alex and the rest of the team to learn the truth about Gene Hunt.

When an art dealer's wife is taken hostage at gunpoint, Luther leads a tense investigation. The hostage takers want payment in diamonds so, stalling for time, Luther substitutes a bag of replacement diamonds from the Serious Crime Unit's evidence safe. Luther and DCI Reed are on hand to arrest the gang members picking up the gems, but when everything starts to unravel Luther begins to suspect that even Reed has double-crossed him.

Charlie asks Caroline out to build her confidence.

Amanda wants the head of a high-tech bank robber, while Nick seeks an antidote for the poison that is slowly killing him.