Isobel Swan, a sixth form student, has been murdered. First, her ring finger is severed, then her throat is cut. With the investigation going nowhere fast, Detective Inspector Nick Dixon is sent undercover as a trainee teacher into Isobel's boarding school.

A trainee jockey has been kicked to death by an aggressive stallion at the local stables. Deemed an accidental death, the case is closed. But when the jockey's brother returns from active service, he sparks an armed siege, demanding the investigation be re-opened and the truth uncovered. Still recovering from the physical and mental scars of his last case, Detective Inspector Nick Dixon is dragged deep into a murky world of betting scams and murder, where people will do anything to keep their secrets.

A man has been mutilated and left to drown on the incoming tide, handcuffed in his van. With the murder bearing a striking resemblance to a string of sadistic killings carried out with surgical precision in 1990s gangland Manchester, it can mean only one thing: the killer is back. Transferred to the Major Investigation Team, DI Nick Dixon is assigned a new partner and sent to Manchester. Meanwhile, the gruesome murders in Somerset continue.

The body of an elderly man is found in an abandoned World War Two pillbox beside the Bridgwater and Taunton Canal. With no obvious motive and no credible suspect, DI Nick Dixon starts digging into the victim's past. The more he digs, the deeper Dixon is drawn into a case that takes him from the cave systems beneath rural Somerset to the heart of government, and threatens to expose a military cover-up at the highest level.

The discovery of a severed head in a golf course bunker triggers a frantic race to find a serial killer that brings the town of Burnham-on-Sea to a standstill.

Early on a cold Somerset morning, 10-year-old Alesha Daniels is reported missing by her father, a violent alcoholic. Her mother, a known drug addict, is found unconscious, but it’s her mother’s boyfriend the police are keen to trace. As the hunt for Alesha gathers pace, a second local girl is taken, plunging another family into the depths of despair. Cutting short his holiday, DI Nick Dixon races home to join the Major Investigation Team, but no sooner has he identified a network of local suspects than they begin to show up dead.

DI Nick Dixon is on the hunt for a vicious serial killer, following a trail of fingerprints and DNA across west Somerset. When the body of a young woman is found on the building site of a nuclear power station, work grinds to a halt. The body bears all the hallmarks of yet another random murder at the hands of the escaped killer. Then Dixon finds a motive. Fighting for his place on the Major Investigation Team, he soon uncovers a family’s desperate search for the truth, exposing a web of corruption and death that will shake the billion-pound construction project to its foundations.

When a badly decomposed body is discovered during an archaeological dig on the Sedgemoor battlefield, Avon and Somerset police are notified immediately. The remains are recent, and Detective Chief Inspector Peter Lewis knows exactly who they have found. A single stab wound from a curved blade implicates convicted serial killer Daniel Parker, who Lewis arrested fifteen years ago.

Detectives Calladine and Bayliss hunt for a vicious killer. The first victim is found on waste ground. His tongue has been cut out and stuffed down his throat. Then another body is found dumped in a lake up in the hills. The same gruesome murder method is used. And guess who the detectives’ new boss is? The incredibly difficult Stephen Greco. A twisted killer...and a wicked twist.

When the mutilated remains of a woman are retrieved by local fishermen, it falls to DI Tom Janssen and his team to identify how she came to be in the water and what put her there. Joined on the case by his new permanent boss, DCI Tamara Greave, it remains to be proven if the woman's death was a result of foul play or a tragic accident.

When the remains of a brutally murdered young woman are left hanging from the Glenfinnan Monument in the Highlands of Scotland, DCI Jack Logan and his Major Investigations team are dispatched to investigate. At first, the case appears to be fairly open and shut. But, as evidence mounts, Jack uncovers some shocking truths about the victim that risk turning the investigation into a potentially explosive international incident.

When a killer starts murdering lawyers in a prestigious law firm, and every lead takes them to a dead end, Detective Chief Inspector Whitney Walker finds herself grappling for a motive. What links these deaths, and why use a lethal injection? Alongside forensic psychologist, Dr. Georgina Cavendish, they close in on the killer, while all the while trying to not let their personal lives get in the way of the investigation.

In the quiet coastal town of Weston-super-Mare, a body is discovered at the foot of a cliff just months after a near-identical tragedy - and Detective Inspector Louise Blackwell can't believe it could be a coincidence. Next to the body, she discovers a note that echoes one found beside the first: Death is not the end. Louise is certain that behind these desperate acts someone is pulling the strings, but how many more will plunge to their demise before she can find out who - and why?

A retired judge is shot dead outside the Dog and Gun inn in the remote Yorkshire village of Niddersgill. There's a witness who saw everything, and the gunman's on the run; the case should be open-and-shut for DCI Jim Oldroyd. But the murderer had no motive for wanting Sandy Fraser dead and, what's more, no trace of him can be found.

Detectives Calladine and Bayliss face a vicious serial killer in a mystery with a shocking ending. A woman’s body is found in a disused church, a homemade stuffed toy by her side. The victim had been dumped there months ago. The crime has the hallmarks of 20-year-old case whose alleged perpetrator is in prison. Detective Ruth Bayliss must work out whether a serial killer has returned, or if a new killer is just taunting the police. Her partner DI Tom Calladine faces the fight of his life to clear his name of corruption accusations. And then things go from bad to worse for Calladine.