After a teenage boy is found dead on a Lenchester train, Detective Chief Inspector Whitney Walker believes they’re being targeted by the notorious Carriage Killer, who chooses a local rail network, commits four murders, and moves on. Against her wishes, Walker’s boss brings in officers from another force to help the investigation and prevent more deaths, but she’s forced to defend her team against this outside interference.

Police officer Sebastian Clifford never planned on becoming a private investigator. But when a scandal leads to the disbandment of his London based special squad, he finds himself out of a job. That is, until his cousin calls on him to investigate her husband’s high-profile death, and prove that it wasn’t a suicide. Clifford’s reluctant to get involved, but the more he digs, the more evidence he finds. With his ability to remember everything he's ever seen, he's the perfect person to untangle the layers of deceit.

Brought up believing that sex is the devil's work, a killer only finds release once he has saved his victim's souls. Abiding by his vision, he marks them as his. A gift to guide his chosen ones on the rightful path to redemption. Detective Inspector Paolo Sterling is out to stop him, but Paolo has problems of his own. Hunting down the killer as the death toll rises, the lines soon blur between Paolo's personal and professional lives.

Five figures gather 'round a shallow grave. They had all taken turns to dig. An adult-sized hole would have taken longer. An innocent life had been taken, but the pact had been made. Their secrets would be buried, bound in blood. Years later a headmistress is found brutally strangled, the first in a spate of gruesome murders that shock the Black Country.

Meet DCI Lesley Clarke. She’s a straight-talking city copper who doesn’t suffer fools gladly…and she’s been transferred to rural Dorset. After being injured in a bomb attack, Lesley is presented with a choice - early retirement, or a period of respite in a calmer location. But things don’t stay calm for long. Before she’s even started her new job, Lesley is dragged into investigating a murder at one of England’s most iconic landmarks, the imposing Corfe Castle.

Finding a home at DCI Alexander Monroe's Last Chance Saloon Crime Unit, Declan and his team are still recovering from the fallout connected to their most recent case.... But when Declan's old mentor, now terminally ill with cancer confesses to a gruesome murder, on the condition that Declan himself takes on the case, Declan and his colleagues find themselves in a race against time to find the real killer before a violent gang war breaks out over it. 

Detective Chief Inspector Ryan retreats to Holy Island seeking sanctuary when he is forced to take sabbatical leave from his duties as a homicide detective. A few days before Christmas, his peace is shattered, and he is thrust back into the murky world of murder when a young woman is found dead amongst the ancient ruins of the nearby priory. When former local girl Dr. Anna Taylor arrives back on the island as a police consultant, old memories swim to the surface, making her confront her difficult past.

Meet Zoe Finch, West Midlands Police's newest Detective Inspector. She's outspoken, ambitious, and damaged. And she's working a case that could make her career, or cost her everything...Fresh from the success of the Canary investigation into depravity and corruption at the highest levels, she's attracted attention. Not least from Assistant Chief Constable Bryn Jackson. But when Jackson is brutally murdered on the night of his retirement party, Zoe is dragged into a case that's deeply personal.

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?

Haunted by his inability to track down and save his missing wife, DCI Robert Kett leaves the Metropolitan Police behind and moves to Norwich with his three young children, hoping to heal their broken family. But his newfound peace doesn’t last. Two newspaper delivery girls have gone missing in the city, and the clues point to a serial kidnapper. Kett is dragged into the centre of one of the darkest cases of his career - a case that pits him head-to-head against a horrifying evil.

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.

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.

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.

Detective Inspector Stella Cole was a rising star in London’s Metropolitan Police. Then a hit-and-run driver killed her husband, Richard, a human rights lawyer. Grief drove her to booze and pills. Back at work after a year’s compassionate leave, Stella secretly re-investigates his death and begins to suspect a cover-up. Freelance journalist Vicky Riley was working with Richard to expose corruption buried deep inside the legal system. Unaware that powerful people are out to stop her, she contacts Stella.

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.