Detective Finnegan Beck is called to a crime scene - a remote house near the rural Irish town of Cross Beg - where a dog lies whimpering beside his beloved owner’s body. At first it looks like a burglary gone wrong. But Beck spots something his colleagues didn’t. The victim, Eddie Kavanagh, was wearing his smartest clothes. He’d brushed his hair. And, on closer inspection, a small velvet box containing an engagement ring is discovered in his pocket, along with a letter to a nameless woman, which seems to suggest she’s in danger.

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?

DI Owen Sheen vowed to his father never to return to Ireland. But years have passed, and Sheen needs answers to the questions he has surrounding his brother’s death. He is on loan from the Met under the belief he will be helping set up a new Historical Offences Team. On arrival to Ireland, plans change, and he finds himself partnered with newly promoted DC Aoife McCusker to work on her first appointed murder investigation.

DI Nikki Galena: A police detective with nothing left to lose, she's seen a girl die in her arms, and her daughter will never leave the hospital again. She's gotten tough on the criminals she believes did this to her. Too tough. And now she's been given one final warning: make it work with her new sergeant, DS Joseph Easter, or she's out.

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.

When the bloody remains of a missing gamekeeper’s dog are discovered on the moors, it soon becomes clear to DCI Harry Grimm and his team that this was no wild animal attack. Thrust into the violent, money-driven world of illegal dog fighting, and with the worst humanity has to offer seemingly always one step ahead, Harry’s need for justice, and his own fragile self-control, will be tested to the limit. Some people will do anything for money. And one detective will do anything to stop them.

Two marked men, three missing women and an approaching storm, powerful enough to change the Norfolk landscape forever. As a category four storm looms large over Norfolk’s wide open horizon, DI John Tanner is given the task of solving a high-profile murder. But when another body is found just as three women are reported missing, he faces a race against time to uncover the truth before the storm moves in to destroy everything in its path, including the evidence Tanner so desperately needs.

Deborah Jenkins pulls her coat around her as she sets out on her short walk home in the pouring rain. But she never makes it home that night. And she is never seen again.

Four years later, an abandoned baby girl is found wrapped in dirty rags on a doorstep. An anonymous phone call urges the police to run a DNA test on the baby. But nobody is prepared for the results. The newborn belongs to Deborah. She’s still alive.

When a freshly mummified body is discovered at the Brighton Museum of Natural History, Detective Francis Sullivan is at a loss to identify the desiccated woman. But as Egyptian burial jars of body parts with cryptic messages attached start appearing, he realises he has a serial killer on his hands. Revenge, obsession and an ancient religion form a potent mix, unleashing a wave of terror throughout the city. Caught in a race against time while battling his own demons, Francis must fight to uncover the true identity of the Embalmer before it's too late. 

When Anna Crowe is killed in her sleep alongside her children, the quiet local community of Corbally is shocked. It’s also a chilling reminder of when her sister, Janey, disappeared as a baby, 29 years ago, never to be seen again. Detective Iris Locke is assigned to the case, and, after a year undercover which ended in failure when her cover got blown, she’s desperate to make her mark - and to live up to the reputation of her ex-cop father, the former head of the Limerick Murder Squad.

As Detective Dan Lockhart is called to a wealthy London street to investigate Natasha’s death, he’s startled by the similarity to a previous case. Noticing the cable-tie restraints and the tiny scratches on Natasha’s wedding finger, Dan already knows what he will find if he looks in her mouth - the metal ball which choked her to death. Months earlier, Kim Hardy was found in the same position in a run-down hotel across the city - an identical silver ball in her throat. But Kim’s murderer was caught and sent to prison - did they arrest the wrong man?

After an incident makes remaining in Glasgow impossible, Police Sergeant Don Colyear is sent to work in a remote Highlands town. His new Inspector wants him gone and the locals wonder why he’s even there. Still, Don makes a go of things, striking up a good working relationship with rookie officer Rowan Forbes. As Don starts to investigate petty crimes, it soon becomes clear that there is something off about the town. A string of teenage disappearances has not been given due attention. 

When a woman's body is discovered in a cathedral and hours later a young man is found hanging from a tree outside his home, Detective Lottie Parker is called in to lead the investigation. Both bodies have the same distinctive tattoo clumsily inscribed on their legs. It's clear the pair are connected, but how? The trail leads Lottie to St Angela's, a former children's home, with a dark connection to her own family history. Suddenly the case just got personal.

A mutilated body is found dumped at Cowane's Hospital in the heart of historic Stirling. For DCI Malcolm Ford it's like nothing he's ever seen before, the savagery of the crime making him want to catch the murderer before he strikes again. For reporter Donna Blake it's a shot at the big time, a chance to get her career back on track and prove all the doubters wrong. But for close protection specialist Connor Fraser it's merely a grisly distraction from the day job. 

When two bodies are found sprawled at the bottom of the Devil's Kitchen in the mountains of Snowdonia, it looks like a murder-suicide. But something doesn't feel right to Detective Inspector Ian Drake, and his gut instinct has never let him down before. Drake suspects at least one of the deaths could be suspicious, but who would kill such an ordinary couple, and why? This might be Drake's first murder inquiry, but his years as a detective have taught him one thing - every murder has a motive, and every killer leaves a trace.