When a young man wakes up bruised, beaten and with no memory of who he, the press immediately dub him 'The Lost Man'. Ten months later Richard Kite remains as desperate as ever. Despite appeals and the efforts of the police, no one knows this man. Kite's last hope may be private investigator David Raker. But Raker has more questions than answers. Who is Richard Kite? Why does no one know him? And what links him to the body of a woman found beside a London railway line two years ago?

It's a night just like any other in the Conister home - but then Paul heads upstairs and never comes back. When his wife, Maggie, goes to see where he is, she can't find him. His phone and wallet are by the bed. The windows are locked from the inside. Paul has vanished. Missing persons investigator David Raker is an expert in locating the lost. So when he's hired by Maggie, he knows that in every disappearance - however impossible it seems - there's an answer. What he doesn't know yet is that his search for Paul Conister will become linked to three other mysteries.

Exhausted single mother Rebekah Murphy leaves her daughters with a friend in the city to accompany her brother on a work assignment on a picturesque island. An hour after arriving, her and her brother are attacked. He vanishes, she's left for dead and, by the time she makes it back to safety, it's already too late: the island has closed for the season - and it'll be seven months before anyone returns. But even with her brother missing, even with no boats, phones or people, Rebekah will soon realise that finding a way back to the mainland is only the start of her nightmare.

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?

Glasgow 1975. An arson attack on a Glasgow warehouse causes the deaths of a young mother and child. Police suspect it’s the latest act in a brutal gang warfare that’s tearing the city apart - one that DI Duncan McCormack has been tasked with stopping. Five years ago he was walking on water as the cop who tracked down a notorious serial killer. But he made powerful enemies, and when a mutilated body is found in a Tradeston slum, McCormack is assigned a case that no one wants. 

It's New Year's Eve of 1999 when four teenagers working late are attacked at a Blockbuster video store in New Jersey. Only one inexplicably survives. Police quickly identify a suspect, the boyfriend of one of the victims, who flees and is never seen again. Fifteen years later, four more teenagers are attacked at an ice cream store in the same town, and again only one makes it out alive. In the aftermath of the latest crime, three lives intersect: the lone survivor of the Blockbuster massacre, the brother of the fugitive accused and FBI agent Sarah Keller.

At a beautiful villa in the south of France, Hannah Carreras works as a maid. Under strict instructions never to speak to the guests, she blends into the background - but she sees everything, including the mistress, Summer, lounging by the pool, awaiting the arrival of her married lover, Steve. When Steve finally shows at the villa - with his family unexpectedly in tow - Summer has vanished. Steve claims he never saw her. But Steve’s wife is no fool: she knows there’s something going on. Whose tiny bikini lies by the pool? Whose perfume is in the bathroom?

An archaeological dig at the old South Leith parish kirkyard has turned up a mysterious body dating from around 700 years ago. The experts wonder if she wasn't murdered and dumped, but some suspect that this gruesome discovery is a sacrifice, placed there for a specific purpose. Then a second body is unearthed. This victim went missing only 30 years ago - but the similarities between her death and the ancient body's suggest something even more disturbing.

The head of Scotland’s most powerful crime family is brutally murdered, his body dumped inside an ancient grave in a remote cemetery. DS Max Craigie and DC Janie Calder arrive at the scene, a small town where everyone has secrets to hide. They soon realise this murder is part of a blood feud between two Scottish families that stretches back to the 1800s. One thing’s for certain: it might be the latest killing, but it won’t be the last.

When young London professional Alex Evans is informed that his sister's body has been pulled from an icy lake in Northern Lapland, he assumes his irresponsible sister accidentally drowned. He travels to the wealthy winter resort where Vicky worked as a tour guide and meets Agatha Koskinen, the detective in charge. Agatha is a no-nonsense single mother of three who already thinks there's more to Vicky's case than meets the eye. As the two form an unlikely alliance, Alex also begins to suspect the small town where his sister lived and died is harbouring secrets. 

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.

On a stifling afternoon at police HQ in Algiers, Superintendent Taleb, coasting towards retirement, with not even an air-conditioned office to show for his long years of service, is handed a ticking time bomb of a case that will take him deep into Algeria's troubled past and its fraught relationship with France. To his dismay, he is assigned to work with Agent Hidouchi, an intimidating representative of the country's feared secret service, who makes it clear she intends to call the shots.

Jodie Martindale's disappearance remains a mystery, unsolved to this day. David Kelman covered the story. But he made a huge mistake, which cost someone their life. Now, he has evidence he shouldn't have. It's a message from Jodie - who has been missing for 10 years - but sent just two weeks ago.

Undercover cop Chris Sketty became a hero when he almost died trying to stop the most brutal terror attack in UK history. With the suspects either dead or missing, the real motive remains a mystery. But someone is convinced Sketty is a liar. A criminal mastermind. A murderer. Blackmailed into revealing the truth, Sketty will share a twisting tale of betrayal, deception and murder...with a revelation so shocking that nothing will be the same again.

When DS Royston Chase is called to the scene of a fatal road collision, his task is to identify the girl who died alongside the ex-chief constable of Wiltshire Police. Paired with the bold and strident DC Claire Laney, Chase is given the task of closing the case quickly and quietly. But when the girl’s DNA provides a familial link to a child who vanished from her home 20 years earlier, Chase and Laney refuse to accept the coincidence. The pair start looking harder at the ex-cop’s life, at which point they encounter serious opposition. Perhaps deadly serious.