It begins with a letter... The letter contains a request - think of a number, any number - and a sealed envelope. Inside the envelope is that number... When Dave Gurney, retired NYPD homicide detective, is contacted by an old college acquaintance about some startling letters he’s been receiving, it is at first little more than a diverting but sinister puzzle. Until the acquaintance is brutally killed.Suddenly Gurney finds himself in the middle of a murder investigation that makes no sense.

Van Shaw was raised to be a thief, but at the age of 18 he abruptly abandoned the illicit life and joined the US Army, leaving behind Seattle and his grandfather who taught him the trade. But after 10 years of estrangement, Van's grandfather has suddenly asked him to come home. He does so only to find his grandfather shot in the head and bleeding out on the kitchen floor....

Detective Miles Jensen is called to the lawless town of Santa Mondega to investigate a spate of murders. This would all be quite ordinary in those rough streets, except that Jensen is the Chief Detective of Supernatural Investigations. The breakneck plot centres around a mysterious blue stone, 'The Eye of the Moon', and the men (and women) who all want to get their hands on it: a mass murderer with a drink problem, a hit man who thinks he's Elvis and a pair of monks among them.

First, Patrick receives a DVD in the post. It shows footage of him and his wife Ariana walking, dressing, going to work - all filmed by cameras hidden in their house. Someone is clearly out to get him. And then the email arrives: GO ALONE. TELL NO ONE. DO WHAT WE SAY. OR SHE DIES. Patrick’s life is turned upside down. Suddenly this has become a matter of life and death.

Nick Horrigan has finally put his traumatic past behind him...until a SWAT team smashes into his place in the middle of the night. He's told that a terrorist has seized control of a nuclear power plant and is threatening to blow it up... Unless he can talk to Nick. As Nick rockets toward the truth, peeling back layer after layer of lies and deception, only one thing is certain: the long-buried secret, tied to the traumas of his own past, threatens his life at every turn.

Tormented and racked with guilt over the brutal slaying of his wife and daughter, Charlie Parker, ex-cop with the NYPD, agrees to track down a missing girl. It is a search that will lead him into an abyss of evil. At the same time, he is warned by an old black woman in Louisiana that "The Travelling Man" is about to strike again. Multiple strands converge with a horrific confrontation in which hunter and hunted are intimately connected by guilt.

‘I know you, don’t I?’ Five words - that’s all it takes to plunge Mike Wingate and his family into mortal danger. Mike doesn’t recognise the crippled stranger who approaches him at a party... but the stranger seems to know all about him. What has Mike done? Do they have the wrong man? Overnight, the threats become attacks, and Mike, his wife, and their young daughter learn they aren’t safe anywhere - especially not their own home. He doesn’t know who they are. He doesn’t know what they want.

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. 

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.

Eighteen-year-old Hattie Hoffman is a talented actress, loved by everyone in her Minnesotan hometown. When she's found stabbed to death on the opening night of her school play, the tragedy rips through the fabric of the community. Sheriff Del Goodman, a close friend of Hattie's dad, vows to find her killer, but the investigation yields more secrets than answers: it turns out Hattie played as many parts offstage as on.

Do you need my help? It was always the first question he asked. They called him when they had nowhere else to turn. Raised and trained as part of a top-secret programme, he was sent to the worst places in the world to do things his government denied any knowledge of. Then he broke with the programme and disappeared. But now someone's on his tail. Someone who knows he was once known simply as Orphan X.

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.

Scott Fenney is a hotshot corporate lawyer at a big Dallas firm. At 33, in the prime of his life, he rakes in $750,000 a year, drives a Ferrari, and comes home every night to a mansion in Dallas' most exclusive neighbourhood. He also comes home to one of Dallas' most beautiful women, with whom he has a much-loved daughter, Boo. For Fenney, life could not be better. But when a senator's son is killed in a hit-and-run, Fenney is asked by a state judge to put his air-conditioned lifestyle on hold.

Reality TV star Buck Nance incites a riot in a bar and vanishes in the melee. His agent, Lane Coolman, has been accidentally taken hostage by two petty criminals who now think they can turn a quick profit by ransoming an LA talent agent.

The mystery of Buck’s disappearance draws in a range of characters from across the island, including a redheaded con artist named Merry who, using a razor blade and a high-speed car, has developed a signature way of luring in her victims.

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?