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.

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….

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.

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.

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.

Guilt and grief have driven a wedge between long time crime-fighting partners psychologist Tony Hill and ex-DCI Carol Jordan. But just because they're not talking doesn't mean the killing stops. Someone is killing women. Women who bear a disturbing resemblance to Carol Jordan. And when the evidence begins to point in a disturbing direction, thinking the unthinkable seems the only possible answer.

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. 

On a freezing morning four drunken students stumble upon the body of a woman in the snow. Rosie has been raped, stabbed and left for dead in a cemetery. The only suspects are the four young men now stained with her blood. Twenty-five years later the police mount a cold-case review of Rosie’s unsolved murder, and the four are still suspects. But when two of them die in suspicious circumstances, it seems that someone is pursuing their own brand of justice....

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 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....

A quiet night on a country road. The stillness shattered by a car engulfed in flames, and a burned body discovered in the driver's seat. As the investigation unfolds, DCI Carol Jordan and psychological profiler. Tony Hill quickly realise that this is more than just a tragic accident. And so begins the hunt for a truly terrifying killer, someone who believes he is invisible, untraceable and untouchable. 

When the call comes in about Lucy, a 17-year-old girl murdered after the secret party she held in her parents’ home, Detective Lottie Parker is first on the scene. As Lottie breaks the news to Lucy’s heartbroken parents and the devastated partygoers, she discovers that hours before her death Lucy had revealed a terrible secret about her friend Hannah. And when Lottie finds Lucy’s bloodstained clothing hidden in Hannah’s bedroom, she has no option but to bring the shy, frightened girl into custody. But Hannah claims to have no memory of the night Lucy died.

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.

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.