When a homeless man is found murdered in picturesque Lincoln, Northolme-based DS Catherine Bishop is drafted in to infiltrate Phoenix House, the shelter where 'Mackie' occasionally spent the night. Working undercover with a new team is tough enough, especially as Catherine is still dealing with the emotional fallout from a previous case, but when someone close to her is critically injured in what may or may not be a related attack, the stakes are even higher. Everyone who knew Mackie seems to have something to hide. How do you catch a killer when no one is willing to talk?

In the remote forests of Stillwater, Minnesota, you can scream for days and no one will hear you. So when the bodies of two 15-year-old girls are discovered frozen in the snow, Special Agent Nikki Hunt is sure the killer is local: Someone knew where to hide the girls and thought they would never be found. Though Nikki hasn’t been home in 20 years, she knows she must take over the case.

The frozen body of a man is discovered in a used car yard on the hottest day of the year, his face contorted by fear and pain. Detective Kay Hunter and her team are assigned the case, but when they find out who their victim is, their worst fears are realized. There is another man missing - but is he a victim, or a killer? With time running out and witnesses afraid to talk, Kay is thrust into one of the most challenging investigations of her career to date. 

When human remains are discovered under Bradford’s derelict Odeon car park, DS Nikita Parekh and her team are immediately called to the scene. Distracted by keeping her young nephew out of trouble, Nikki is relieved when the investigation is transferred to the Cold Case Unit, and she can finally focus on her family. But after the identity of the victim is revealed, she’s soon drawn back into the case. The dead man is a direct link to her painful past. As the body count begins to rise, Nikki must do everything she can to stop the killer in their tracks before anyone else gets hurt.

FBI Agent Ella Dark, 29, is given her big chance to achieve her life’s dream: to join the Behavioral Crimes Unit. Ella has a hidden obsession: She has studied serial killers from the time she could read, devastated by the murder of her own sister. With her photographic memory, she has obtained an encyclopedic knowledge of every serial killer, every victim, and every case. Singled out for her brilliant mind, Ella is invited to join the big leagues. 

After playing a TV sleuth for years, Rita Martin retires to the sleepy town of Frantham-on-Sea. Here on the Dorset coast, she runs her own immaculate guest house, and life is blissfully quiet. But then a few doors down, harmless old Mrs. Freer is bludgeoned to death, and Rina can’t help but be drawn into the mystery. Mrs. Freer’s home was ransacked, but this was no ordinary burglary. Who knew the old lady kept a gun stashed under her pillow? And who wanted it badly enough to kill?

Jaime Connor and her family venture out for the day, only for it to end in disaster. A chance encounter with two teenagers puts Jaime's life in mortal danger. Why was Jaime abducted? During the investigation, DI Kayli Bright and her partner DS Dave Chaplin uncover shocking revelations about Jaime's family.

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.

The inspector frowned and examined the earth under the trees. As he scanned the glade, his stomach lurched. One, two, three, four. Five, counting the mound of earth disturbed under the tent. Somebody had cleared the earth of its natural layer and sown their own flowers. In five places. Five graves. A young woman, Fiona Holland, has gone missing from a small Irish village. A search is mounted, but there are whispers. Fiona had a wild reputation. Was she abducted, or has she run away?

Twenty-five years ago, on Halloween night, eight-year-old Kelly Doherty went missing while out trick or treating with friends. Her body was found three days later, floating face down, on the banks of the Creggan Reservoir by two of her young classmates. It was a crime that rocked Derry to the core. Journalist Ingrid Devlin is investigating—but someone doesn’t want her to know the truth. As she digs further, Ingrid starts to realise that the Doherty family are not as they seem. But will she expose what really happened that night before it’s too late?

DI Geraldine Steel is called to investigate the murder of a man who has been battered to death. His widow, Caroline, is terrorised into concealing the identity of the killer who then claims a second victim. This leaves Geraldine with a dark secret. The truth might help to solve the case, but it also threatens to cost Geraldine her career. When Caroline's 10-year-old son disappears, his distraught mother turns to the police, with fatal consequences.

Hiding her personal connection to the victim - and a double-life which must remain secret at all costs - Helen becomes a woman possessed, working her team around the clock to chase down every lead. As the killer strikes again, the investigation takes its toll not only on Helen but also her senior officers. Tempers flare, friendships fray and Helen faces an impossible choice. Confess her sins and lose control of the case? Or keep living a lie, protecting her darkest secrets, and risk getting trapped in this tangled web?

On a freezing morning four drunken students stumble upon the body of a woman in the snow. Rosie has been raped, stabbed and left for dead in a cemetery. The only suspects are the four young men now stained with her blood. Twenty-five years later the police mount a cold-case review of Rosie’s unsolved murder, and the four are still suspects. But when two of them die in suspicious circumstances, it seems that someone is pursuing their own brand of justice....

Duncan Kincaid and Gemma James find themselves drawn into a web of deceit and treachery that has its roots in the turmoil of 1939, as Britain and Germany hover on the brink of war. Gemma learns that her friend Erika Rosenthal lost a valuable brooch during her escape from Berlin. Now that heirloom has turned up at auction, and Erika asks Gemma's help in discovering its whereabouts for the last 50 years.

When Brighton tattoo artist Marni Mullins discovers a flayed body, newly-promoted DI Francis Sullivan needs her help. There's a serial killer at large, slicing tattoos from his victims' bodies while they're still alive. Marni knows the tattooing world like the back of her hand, but has her own reasons to distrust the police. So when she identifies the killer's next target, will she tell Sullivan or go after the Tattoo Thief alone?