When DCI Will Blake is called to investigate a blood-drenched gravestone, the evidence leads to Trevor Long, local paranormal investigator, self-styled medium, and conspiracy theorist. Long vanished while he was investigating the mysterious, axe-wielding Sons of Sol, worshippers of the Viking sun goddess. But Long’s life, like his death, is far from straightforward, and Blake’s team is drawn into a deadly game. 

When a three-year-old girl goes missing in the sprawling Birkenhead Park, Blake has a puzzle on his hands. The child seemed to vanish into thin air and nobody saw anything, not even her nanny. A known paedophile is spotted in the area and the clock begins ticking as Blake tries to find the lost girl. The team uncover secret after secret as they investigate but Blake has got problems closer to home as his girlfriend’s past comes back to haunt her in a brutal and devastating way. When a key witness dies, Blake realises that a killer is on the loose.

The murder of a young girl found barefoot in a country park and the re-emergence of shoes from the victims of a serial killer from over 40 years ago. A coincidence or a connection? Will Blake is determined to find out, but as he unearths the past, questions are raised about the original investigations, and it becomes clear that The Wirral has a killer on the loose, once again.

Detective Chief Inspector Harry Grimm is forced to take leave from Bristol’s Major Investigations Team when his boss, tired of Harry chasing the ghost of his murderous father, sends him north on secondment. Used to city life and high stress, Harry fears his life will now be spent handing out speeding tickets, finding lost sheep, and directing tourists. But when a local teenager runs away, Harry finds himself pulled into an investigation much worse than anyone could have ever expected. 

When a young man is found frozen to death on a Highland street in mid-December, DCI Jack Logan initially puts it down to a Christmas night out gone tragically wrong. But, when a postmortem reveals something more sinister, Jack discovers he is dealing with a cold, calculating killer with a long line of victims, a talent for torture, and a perverse sense of justice. 

Late on midsummer's night there is a splash in the river Thames. A body is found on an island, asphyxiated and laced with strange markings. For DCI Craig Gillard it's a baffling case. The victim's identity is elusive, clues are scarce and every witness has something to hide. Meanwhile one of Britain's deadliest serial killers is finally up for parole after a deal to reveal the location of two missing bodies. The felon has his own plans to get even with witnesses, accusers and the officer who caught him 30 years before. And who was that? A young trainee by the name of Gillard.

After the dramatic theft of a priceless artefact from Durham Cathedral, the rest of the world believes that DCI Ryan and his team were able to recover and return St Cuthbert's cross to its rightful home. But Ryan knows the cross he recovered was a fake - far from being over, their problems are only just beginning. Just as Ryan and his team begin to unravel the truth behind the spate of mysterious thefts, something even more priceless is stolen - something that can never be replaced. 

Just when he thought he was out.... Burdened by guilt over the trauma recently inflicted on his friends and colleagues, former-Detective Chief Inspector Jack Logan has spent the past nine months living in self-imposed exile. When a mother and her young daughter are the victims of a double murder staged to look like suicide, Logan is dragged back to help hunt down and catch a brutal, calculating killer. But the world has moved on without him.

The remains of a 17th-century witch, an MP found hanging above a five-pointed star and three girls with powers beyond anyone's control. As DI Tanner and DS Evans endeavour to make plans for their big day, the chance discovery of Norfolk's last known witch, tried and hanged by Norfolk’s infamous Witchfinder General, sparks a chain of the most horrific events, none of which Tanner seems able to prevent.

A murdered millionaire. A violent drug operation. Can a detective with a haunted past stop the next assassination? Detective Inspector Ruth Hunter is still struggling to deal with her stress. So when the body of a businessman washes up on a secluded North Wales shore, the former London cop is anxious to prove she can lead the local investigative team and nail the killer. But as she digs into the dead millionaire’s business affairs, DI Hunter discovers a disturbing link to an infamous Liverpudlian drug lord...

A young boy walks into a police station in France. He claims to be Carl Meagan - a missing child from Sheffield whose name is still whispered as a warning to kids who stay out after dark. On her way home from the supermarket, nine-year-old Keeley Armitage vanishes without trace. Her family is overcome with shock and DCI Matilda Darke can’t help but focus on memories of the Carl Meagan case that almost ruined her career.

When Dr. Nathan Frost, a lecturer in German literature at Oxford University, is invited to a lavish party at the country house of a wealthy businessman, he knows there'll be a price to pay. After all, as an expert on the legend of Faust and Mephistopheles, he can recognize a deal with the devil easily enough. But even he's not expecting such a sinister end to the evening. 

Sally Summerby charges into a Leeds police station, utterly distraught. Her five-year-old daughter has gone missing, presumably abducted. Yet despite mobilising all of their resources, the police can find no sign of the child. DI Stewart Gardener gets wind of the case when investigating the murder of a woman in her rented suburban house. She has been pinned to the floor with a bayonet. Yet under her body is a photo of the child.

Detective Inspector Ruth Hunter lives with the pain of her partner’s mysterious and unsolved disappearance. About to hit 50, the veteran police officer trades in the crime-ridden streets of London for a more peaceful life in rural North Wales. But Ruth has barely settled into her new position in North Wales Police, when the body of a brutally murdered woman is discovered...with strange symbols carved into her skin.

When Detective Karen Hart hears a scream echoing out of beautiful Lincoln Cathedral one snowy evening, she is the first officer on the scene. In the chapel a man lies murdered, a bloody cross carved into his forehead. A note to the police from the murderer, signed by "The Cleanser", confirms their worst fears: this sadistic slaying is the first of many. When early leads become dead ends, Karen starts to wonder if there’s a link to a rumoured conspiracy within police ranks - particularly when an abrasive new officer is assigned to the case.