David Caves

Jack is rushed to hospital after collapsing at the scene of a car crash. Following Thomas's discovery that soldier John Sealy may have been exposed to a nerve agent, is it possible someone is targeting the victim's family? With Jack's life in the balance, it's down to Nikki, Thomas and Clarissa to find the truth and save their friend.

The Lyell team identify the concrete-encased remains as those of Derek Marshall, survived by his wife Sue and sister Ann. Clarissa traces payments to a cryogenics facility, leading to the discovery of another suspicious death. Lacking any proper documentation, the coroner orders a post-mortem into the cryogenically frozen body. How did they die, and why was the decision made to freeze them?

The body of a woman is found on railway tracks in London, badly damaged from electrical burns. On the mortuary slab, the woman's recent and historic injuries suggest years of abuse, likely within the home. It's a difficult post-mortem for Nikki, as she is troubled by memories from her childhood.

Nikki determines that Jenny must have died before making contact with the tracks. But when the search for Jenny's killer hits a wall, her friends at the women's refuge seek answers. Meanwhile, Thomas's political ambitions lead him to make friends in high places. Offers are made to open all the right doors for Thomas, but what do they want in return?

Teenagers messing around in a stolen car collide with a concrete pillar in a multi-storey car park. The joyriders escape, but within the smashed concrete, the unmistakable form of a skull is revealed.

Further victims are killed and a distinctive, sadistic modus operandi begins to become clear. The team turns to forensic psychologist Sasha for advice on the killer.

Tension on the tube network threatens to boil over, and security is stepped up. The accidental verdict in the first death is called into question and the witnesses are brought in for interview. Amongst them is Lana Sutherland, a young hotel worker who has taken in a homeless man, Owen. DI Nelson lets Lana slip through the net before he realizes she may be harboring a dangerous killer. Nikki helps Nelson unearth the mystery of his father's death, allowing...

Thomas must put his personal feelings aside as the team track down Begovic before she and her extremist compatriots strike out again.

The accidental fatal shooting of a Polish teenager in an armed police operation triggers a series of murders that link Turkish gangsters, a grieving family and a fractured firearms unit.

When suspected pedophile Dale Barge is found murdered in a children's playground, Nikki and Jack are brought in by inexperienced detective Rory Drennan. It's not long before the team link Barge's death to a missing child, Lizzie Craddock. Jack teams up with Child Protection DI, hard-nosed Gina Conroy. They put pressure on Lizzie's parents, Johnnie and Cheryl, to try to find her. Lizzie's social worker Louise is brought in to help, and Nikki encourages...