It was a vicious, calculated murder. The killer selected his victim at Euston station, followed her home on the tube, strangled her to death in front of her child. At the same time, killed in the same way, a second body is discovered at the back of King's Cross station. And this grisly event eerily echoes the murder of two other women, stabbed to death months before on the same day. It is DI Tom Thorne who sees the link and comes to the horrifying conclusion. This is not a serial killer the police are up against. This is two of them - and two killers are way more deadly than one.... 

Tom Thorne has it all. In Nicola Tanner and Phil Hendricks, Thorne has good friends by his side. He finally has a love life worth a damn and is happy in the job to which he has devoted his life. He has everything to lose. Hunting the woman responsible for a series of grisly murders, Thorne has no way of knowing that he will be plunged into a nightmare from which he may never wake. And he'll do anything to keep it. Finally, Thorne's past has caught up with him and a ruinous secret is about to be revealed. If he wants to save himself and his friends, he must do the unthinkable.

A serial killer is burning people alive in the Lake District's prehistoric stone circles. He leaves no clues, and the police are helpless. When his name is found carved into the charred remains of the third victim, disgraced detective Washington Poe is brought back from suspension and into an investigation he wants no part of. He is reluctantly partnered with brilliant but socially awkward civilian analyst Tilly Bradshaw, and the mismatched pair uncover a trail that only he is meant to see. The elusive killer has a plan, and for some reason Poe is part of it.

When the chief suspect in the notorious "peekaboo cop killer" case blew himself up, almost taking lead investigator DCI  Duncan Bone with him, the psychologically damaged detective thought his days on the force were over. But, when another PC is abducted and murdered in the same deranged peekaboo fashion, Bone is persuaded to return to lead the new investigation.

A rainy night in London. Shots are fired into a car which swerves on to the pavement, ploughing into a bus stop. It seems that a chilling gang initiation has cost an innocent victim their life. But the reality is far more sinister.... One life is wiped out, and three more are changed forever: the young man whose finger was on the trigger, an aging gangster planning a deadly revenge and the pregnant woman who struggles desperately to uncover the truth. Two weeks away from giving birth, how will she deal with a world where death is an occupational hazard?

They were meant to be safe on Fleet Ward: psychiatric patients monitored, treated, cared for. But now one of their number is found murdered, and the accusations begin to fly. Was it one of his fellow patients? A member of staff? Or did someone come in from the outside? DC Alice Armitage is methodical, tireless, and she's quickly on the trail of the killer. The only problem is, Alice is a patient too.

Was the biggest case of his career the worst mistake he ever made? Ten years ago, DCI Jack Logan stopped the serial child-killer dubbed "Mister Whisper", earning himself a commendation, a drinking problem, and a broken marriage in the process...When another child disappears a hundred miles north in the Highlands, Jack is sent to lead the investigation and bring the boy home. But as similarities between the two cases grow, could it be that Jack caught the wrong man all those years ago?

A family is gunned down in the snow, but one of the children survives. Three years on, that child takes revenge, and the Snow Killer is born. But then, nothing - no further crimes are committed, and the case goes cold. 50 years later, has the urge to kill been reawakened? As murder follows murder, the detective team tasked with solving the crimes struggle with the lack of leads. It’s a race against time and the weather - each time it snows, another person dies.

A sinking boat is spotted off the South Coast. Waiting onboard is a grisly discovery. DCI Boyd, recently relocated from London to Hastings, is now with the East Sussex CID, and his first case is that of a local businessman and his new young wife, missing in the English Channel. All that remains of them is a grim scene aboard their half-submerged yacht and a digital trail of clues that could put Boyd and his daughter, Emma, in danger. 

When a girl’s body is found strangled, raped, and horrifically mutilated by a boat’s propeller, deep in the heart of the Norfolk Broads, newly arrived Detective Inspector John Tanner is asked to assist with the investigation. At first, all the evidence points to a man who had a multi-million-pound reason to kill her. But when an alibi is produced from an unexpected source, and another body appears at the base of a slipway, Tanner finds himself turning to local girl Detective Constable Jenny Evans for help. 

Former soldier. Ex-copper. Current man on the edge. Shunned by his old colleagues, and dividing his time between a dead-end job and the bottom of a whisky bottle, former Police Scotland detective superintendent Bob Hoon’s life is a mess. Then an old face from Hoon’s Special Forces days turns up asking for help: His teenage daughter has been missing for months, the police have drawn a blank, and he needs the kind of help that only Hoon can provide. And besides, Hoon owes him one.

In the present, an old fisherman is found dead by the shoreline and a stranger with a mission moves into a shabby Kinloch flat/ Meanwhile, D.C.I. Jim Daley is trying to help Brian Scott stay sober, and the good people of Kinloch are still mourning the death of one of their own. As past and present collide, Daley finds himself face to face with old friends and foes. Memories can only last as long as those who keep them, and ghosts will not be silenced.

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. 

Criminologist Martin Knight lives a gilded life and is a thorn in the side of the police. But then his wife, Liz, goes missing. There is no good explanation and no sign of Martin.... To make things worse, Liz is the ex-girlfriend of DCI Craig Gillard who is drawn into the investigation. Is it just a missing person or something worse? And what relevance do the events around the shocking Girl F case, so taken up by Knight, have to do with the present? The truth is darker than you could ever have imagined.

Lee, southeast London. A young girl has disappeared. There are no witnesses, no leads, no clues. The police are tracking a shadow, and time is running out.... DI Ellen Kelly is at the top of her game - at least she was, until she took the law into her own hands and confronted her husband's killer. Now she's back at work, leading the investigation into the missing child. Her superiors are watching her; the distraught family is depending on her. Ellen has a lot to prove. And she knows it.