DI Nathaniel Caslin has earned the freedom to run his case load as he sees fit, bypassing the hierarchical constraints with his specialist unit. Little does he know a deadly adversary is walking the streets of York. One who will push the team to their psychological limits. Reluctantly agreeing to a joint investigation alongside a detective from the Drug Squad, Caslin is perplexed by the multiple homicides of a number of addicts. Poisoned by their own supply with no apparent motive, the killings appear gang related.

As the only survivor of a horrific car crash, Lila Amberson believes she's on the road to recovery after being released from the hospital. Her memories of the accident are blurred though and a series of unsettling incidents leave her fearing for her safety. Does she have survivor's guilt or is something more sinister at play? Jack Foley's reeling from the shock of losing his sister in the crash, so when he first meets Lila, he lashes out, blaming her for Stephanie's death. But when she gives him a locket that she believes belonged to his sister, it presents more questions than answers.

A murder without motive. A bombing. The sins of the past revisited.... DI Nathaniel Caslin is heading up a specialist unit, an opportunity to make a real difference. Little does he know, decisions taken decades previously are about to threaten all that he holds dear.... Gangland tensions are on the rise as an uneasy peace is fractured in spectacular fashion. Two warring factions are lining up to unseat the other. Old adversaries rekindle their passion to exact revenge whilst the next generation seek to make a name for themselves.

Sussex, England, 1929. Mydworth is a sleepy English market town just 50 miles from London. But things are about to liven up there, when young and handsome Sir Harry Mortimer returns home from his diplomatic posting in Cairo, with his beautiful and unconventional American wife, Kat. No sooner have the two arrived, when a jewel robbery occurs at Harry's aunt's home - Mydworth Manor. The police are baffled and overwhelmed with the case. But Harry and Kat have an edge in the hunt for the dangerous culprit.

Seasoned obituary writer Eve Mallow has a new assignment: to tell the life story of famed musician Bernard Fitzpatrick. A chance to spend a few days in the sweet little village of Saxford St. Peter, walking the country lanes with her beloved dachshund, Gus, and meeting new people sounds like a dream. But it turns out that Bernard’s life was much less interesting than his death. On the day she arrives, news breaks that the charismatic cellist was the victim of a grisly murder. Could this quaint English village be hiding a dark secret?

A string of mutilated bodies sees Detective Chief Inspector Whitney Walker back in action. But when she discovers the victims have all been grooming young girls, she fears a vigilante is on the loose. And while she understands the motive, no one is above the law. Once again, she turns to forensic psychologist, Dr Georgina Cavendish, to unravel the cryptic clues. But will they be able to save the next victim from a gruesome death? 

The body of the beautiful English girl is discovered months later - dumped behind the back of a department store. But who was the stranger she let into the safety of her home? As Detective Rachel Prince pieces together the mystery surrounding Phoebe’s death, another young, blonde girl is found brutally murdered and abandoned in the grounds of an old theatre. In the most dangerous case of her career, Rachel must track down the faceless individual to stop the body count rising. 

Detective Finnegan Beck is called to a crime scene - a remote house near the rural Irish town of Cross Beg - where a dog lies whimpering beside his beloved owner’s body. At first it looks like a burglary gone wrong. But Beck spots something his colleagues didn’t. The victim, Eddie Kavanagh, was wearing his smartest clothes. He’d brushed his hair. And, on closer inspection, a small velvet box containing an engagement ring is discovered in his pocket, along with a letter to a nameless woman, which seems to suggest she’s in danger.

The discovery of a young student floating face down in Lake Windermere, her naked skin almost translucent in the freezing water, looks like yet another tragic teen suicide. But the victim’s lack of clothes make forensic pathologist Beth Adams investigate further. Anything to distract her from the arrival of her abusive ex-boyfriend’s body on the mortuary table that morning. With witnesses keeping tight-lipped and any clues washed away by the tides, it’s up to Beth to find the evidence her team needs. But then another girl is found in the lake, this time still clinging to life.

One beautiful summer’s evening, thirteen-year-old twins Ivy and Erin Westmore snuggle down in a tent in their back garden, giggling and sharing secrets. When their mother goes to wake the girls the next morning, their tent is empty. The alarm is raised, and Detective Natalie Ward is put onto the case. When the twins’ bodies are discovered on nearby marshland, covered with deep pink petals, an icy shiver travels down Natalie’s spine. Everything about the girls’ deaths reminds her of a horrifying case she worked on earlier in her career.

After an elite criminal profiling unit is shut down amid a storm of scandal and mismanagement, only one person emerges unscathed. Forensic psychiatrist Doctor Alexander Gregory has a reputation for being able to step inside the darkest minds to uncover whatever secrets lie hidden there, and soon enough he finds himself drawn into the murky world of murder investigation. In the beautiful hills of County Mayo, Ireland, a killer is on the loose. Panic has a stranglehold on its rural community, and the Garda are running out of time. 

Jenny Starling is spending Christmas in a snowed-in country house cooking all the traditional food she loves. But the family she’s working for are not full of the seasonal spirit. In fact, they seem to hate each other. On Christmas Eve, someone is found dead on the kitchen table. And the head of the family is blaming Jenny! But with an incompetent detective called in, and seemingly no motive for the murder, Jenny will have to give the police a hand. She will stop at nothing to clear her name and find the real murderer. 

After solving an all-too-personal case that almost cost her everything, Kate Marshall is struggling. And when she discovers two disembowelled bodies floating in a local reservoir, things go from bad to worse. But Kate is given a chance to get her life back on track when she is asked to solve a decades-old mystery. The Shadow Sands reservoir was plagued by gruesome deaths for years, and now the murders have started again. Kate and her assistant Tristan are dragged into a shady world of family secrets, deadly legends and grisly murders. 

A businessman found hanged. A tortured and mutilated loaner. High finance has never been so deadly.... DI Nathaniel Caslin is spiralling toward a professional crisis. His biggest case in years has collapsed amid accusations of police intimidation. A rebuilt reputation is now facing ruin.... As the extremes of nationalist hate descend upon York, a refugee is tortured to death while a straightforward case of a bankrupt’s suicide proves to be anything but simple. How does an enigmatic campaigner with a secret to keep link these two disparate worlds?

When a teenage girl flings herself off a cliff in pursuit of a gruesome death, DI Kelly Porter is left asking why. Ruled a suicide, there’s no official reason for Kelly to chase answers, but as several of her team’s cases converge on the girl’s school, a new, darker story emerges. One which will bring Kelly face-to-face with an old foe determined to take back what is rightfully his - no matter the cost.