Colin Wratten

Follows events when the rising nouveau riche, including the Trenchard family, rub shoulders with London's well-known upper classes and when secrets from the past threaten to emerge.

There's growing concern amongst the team over Sarah's disappearance, and time is running out for Boyd as he fights his final battle for justice against a powerful adversary. Will he prevail?

When the Cold Case squad learn that a recently murdered woman is Claire Somers, who as a seven year-old girl was abducted from a care home 25 years ago, they unveil a shocking portrait of life in the 1980s care system.

Boyd is convinced that the missing Donald is not a murderer, and pushes his team to try to make sense of all the vague connections in the case and eventually confront the unfathomable evil lurking within the heart of this sad, unfortunate family.

Boyd is being moved out of the Cold Case Unit, but first he decides to take on the unsolved mystery of 16 homeless boys from Waterloo Bridge who disappeared in the 1980s. The Cold Case team's investigation unearths the grimmest find of their careers.

When a missing medical student's DNA matches with that of an unidentified corpse found tortured and drowned years before, Boyd suspects a cover-up. Unmasking the fears and tensions of the post 7/7 terror attacks, the team discover the cold case victim could have formed part of a terrorist cell.

John is the manager of a cash counting depot who faces his worst nightmare: an armed robbery. His family are taken hostage and he is forced to open the safe at gunpoint. He has been trained for this but nothing can prepare him for the real thing.

Planning for the heist is coming together but the men's lives aren't getting any easier. Chris's mom is getting worse. Marcus is under pressure from Gina to assert himself more. Meanwhile, John tests the guns and enjoys his new found confidence.

Boyd and his team uncover the awful truth behind the walls of the psychiatric hospital, but their investigation provides Linda Cummings with the opportunity to escape. Can they find her before she kills her next victim, someone very dear to Boyd's heart?

DNA evidence found at the scene of a road accident links to a murder during the Bosnian conflict that Eve dealt with while working on mass war graves. Boyd vows to track down the ring of Serbian war criminals, all of whom are now living and working in the UK.