There is one serial killer who has shaped and defined police profiler Tony Hill's life. One serial killer whose evil surpasses all others. One serial killer who has the power to chill him to the bone: Jacko Vance. And now Jacko is back in Tony's life. Even more twisted and cunning than ever before, he is focused on wreaking revenge on Tony - and DCI Carol Jordan - for the years he has spent in prison. Tony doesn't know when Jacko will strike, or where. 

When psychological profiler Tony Hill comes across a series of suicides among women tormented by vicious online predators, he begins to wonder if there is more to these tragedies than meets the eye. Could it be murder? But what kind of serial killer wants his crimes to stay hidden? Tony and DCI Carol Jordan begin the hunt for the most dangerous and terrifying kind of killer - someone who has nothing to fear and nothing to lose.

Meet Tony Hill's most twisted adversary - a killer with a shopping list of victims, driven by the most perverted of desires. The murder and mutilation of teenager Jennifer Maidment is horrific enough on its own. But it's not long before Tony realises it's just the start of a brutal and ruthless campaign that's targeting an apparently unconnected group of young people. Tony battles to find the answers that will give him personal and professional satisfaction in his most testing investigation yet.

After an explosive case that forced Tony Hill and Carol Jordan to reassess everything they thought they knew about right and wrong, both are dealing with the fallout in their own separate ways. While Tony must pay the price for his actions, Carol is conducting investigations into suspected miscarriages of justice. But when a shocking discovery is made on a construction site, and skeletal remains are found to belong to a killer who is supposedly alive and in prison, suddenly Tony and Carol are brought into each other's orbit once again.... 

When Robbie Bishop, star midfielder for the Bradfield Vics, is poisoned by a rare and deadly toxin, profiler Dr Tony Hill and trusted colleague DCI Carol Jordan have their work cut out for them. Then a bomb explodes in the football stadium, causing massive casualties - and another man dies from poisoning. Is there a link between the cases? What are the motives for these crimes? The clock is ticking, and the death toll keeps rising....

A dead girl lies on a blood-soaked mattress, her limbs spread in a parody of ecstasy. The scene matches a series of murders which ended with the conviction of Derek Tyler. But Tyler's been locked up in a mental institution for two years, barely speaking a word. Criminal psychologist Dr Tony Hill thinks this is not a copycat murder but something much stranger. Hill heads towards a terrifying face-off with one of the most perverse killers he has ever encountered….

Young girls are disappearing around the country, and there is nothing to connect them to one another. Dr Tony Hill sets his team an exercise: they are given the details and asked to discover links between the cases. Only one officer comes up with a theory that is ridiculed...until one of their own is murdered. For Tony Hill the murder becomes a matter for personal revenge, and, joined by colleague Carol Jordan, he embarks on a game where hunter and hunted can all too easily be reversed.

A twisted killer targeting psychologists has left a grisly trail across Europe. Dr Tony Hill, expert at mapping the minds of murderers, is reluctant to get involved. But then the next victim is much closer to home....Meanwhile his former partner, DCI Carol Jordan, is working undercover in Berlin on a dangerous operation to trap a millionaire trafficker. When the game turns nasty, Tony is the only person she can call on for help.

Up until now, the only serial killers Tony Hill had encountered were safely behind bars. This one’s different – this one’s on the loose. Four men have been found mutilated and tortured. As fear grips the city, the police turn to clinical psychologist Tony Hill for a profile of the killer. But soon Tony becomes the unsuspecting target in a battle of wits and wills where he has to use every ounce of his professional nerve to survive.

When a teenage joyrider crashes a stolen car and ends up in a coma, a routine DNA test could be the key to unlocking the mystery of a 20-year-old murder inquiry. Detective Chief Inspector Karen Pirie is an expert at solving the unsolvable. With each cold case closed, justice is served. So, finding the answer should be straightforward, but it's as twisted as the DNA helix itself. 

When a skeleton is discovered hidden at the top of a gothic Victorian building in Edinburgh, which is scheduled for renovation, Cold Case Squad detective Karen Pirie is given the task of identifying the decades-old bones. Her investigation leads her back to past conflicts, false identities and buried secrets...

When a body is discovered in the remote depths of the Highlands, DCI Karen Pirie finds herself in the right place at the right time. Unearthed with someone's long-buried inheritance, the victim seems to belong to the distant past - until new evidence suggests otherwise, and Karen is called in to unravel a case where nothing is as it seems. It's not long before an overheard conversation draws Karen into the heart of a different case, however - a shocking crime she thought she'd already prevented. As she inches closer to the twisted truths at the centre of these murders, it becomes clear that she's dealing with a version of justice terrifyingly different to her own....

In the north of England, single women are beginning to disappear from weddings. A pattern soon becomes clear: Someone is crashing the festivities and luring the women away - only to leave the victims' bodies in their own burned-out cars in remote locations. Tony and Carol are called upon to investigate - but this may be the toughest case they've ever had to face. Meanwhile, Detective Sergeant Paula McIntyre and her partner Elinor must deal with a cruel cyber-blackmailer targeting their teenage ward, Torin.

PI Kate Brannigan is hired to investigate a series of strange financial scams across Manchester. At first it looks like a discrepancy with the paperwork, but the deeper Kate digs, the murkier the case becomes. Before long she’s up to her neck in crooked land deals – and murder – and her own life is on the line.

As a favour, Kate agrees to track down a missing songwriter, Moria Pollock. It was supposed to be a nice simple case, but the search soon leads Kate into the dark underworld of Leeds, Manchester and Bradford – and finally to a shocking confrontation with a killer.