When a body is found stuffed into a barrel at a garbage dump, covered in long red lacerations, Detective Jenna Alton and her new deputy, David Kane, rush to the scene. Nothing ever happens in the small American town of Black Rock Falls, so Jenna believes the victim must be one of two recent missing persons, and she fears for the life of the other. Both were strangers to the town, but there's nothing else to link them. Jenna knows someone must have seen something, but no one's talking.

Everyone in the small town of Denton is searching for Isabelle Coleman, a missing 17-year-old girl. All they've found so far is her phone and another girl they didn't even know was missing. Mute and completely unresponsive to the world around her, it's clear this mysterious girl has been damaged beyond repair. All Detective Josie Quinn can get from her is a name: Ramona. Currently suspended from the force for misconduct, Josie takes matters into her own hands as the name leads her to evidence linking the two girls.

When the body of a woman is found hanging from a tree in her front garden, rookie Detective Morgan Brookes is first on the scene. But Olivia Potter is past saving. And when her husband and daughters cannot be traced, Morgan knows there is more to this tragedy. And then she finds them. Lying huddled together in the dark basement, each of their faces covered with a small cotton cloth, their bodies cold to the touch. But as Morgan kneels beside the family, she realizes that one of the girls is still breathing.

An eight-year-old girl, Chelsea Compton, is missing in Pine Valley, California, and for Detective Katie Scott it’s a cruel reminder of the friend who disappeared from summer camp 20 years ago. Unable to shake the memories, Katie vows she won’t rest until she discovers what happened to Chelsea. But as Katie starts to investigate, the case reveals itself to be much bigger and more shocking than she feared. Hidden deep in the forest she unearths a makeshift cemetery: a row of graves, each with a brightly colored teddy bear.

A woman is found naked, badly beaten and barely alive in the New Mexico mountains. The shocking discovery plunges Albuquerque Detective Alyssa Wyatt into a case that will test her to the limit. It appears that Callie McCormick is the latest plaything of a shadowy psychopath that leaves a long shadow on the streets of New Mexico - an individual linked to a string of deaths but leaving no evidence. But when Alyssa makes a breakthrough that just might reveal the killer, she unknowingly puts herself in the crosshairs of a brutal maniac - one with an old score to settle.  

For decades the Moore Asylum was home to the forgotten children of Brooklyn Bay. But ever since a scandal forced its closure, the abandoned building has cast an imposing shadow. Until now - when an elderly man is found dead, his body strapped to an ancient gurney. Detective Lucy Harwin, still reeling from a previous case that ended in the devastating murder of a mother and her child, finds herself on the trail of a killer ruthlessly fixated on avenging the asylum's wrongs.

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.

When the body of a teenage runaway is found hidden inside someone else’s grave in a small-town cemetery in the Lake District, an urgent call is made to forensic pathologist Beth Adams. Still traumatised by a recent attempt on her own life, one look at the beautiful girl’s broken body is enough to bring Beth out of hiding for the first time since her attack. She’s the only one who can help her trusted friend, Detective Josh Walker, crack the most shocking case of his career.  

Three Chicago women have been found strangled, embalmed, and posed as if still alive. Doubting the findings of the local PD’s profiler, the FBI calls on forensic psychologist Zoe Bentley to investigate. Zoe quickly gets off on the wrong foot with her new partner, Special Agent Tatum Gray. Zoe’s a hunter, intense and focused; Tatum’s a smug maverick with little respect for the rules.

The beautiful young woman is perfectly still, curled up in the trunk of the car, her long dark hair hiding her face. Her cotton blouse has ridden up a little, revealing two small dots an inch apart on her back. Just like the others. Guilt has kept FBI Agent Tori Hunter away from her home in Manchester Bay, Minnesota for 20 years, ever since her twin sister disappeared on the Fourth of July, when the girls should have been together. But when she receives an anonymous newspaper clipping about another missing girl, Genevieve, Tori is dragged back to the past.

After a scandal forces DI Kelly Porter out of the Met, she returns home to the Lake District. Crimes in the Cumbrian constabulary tend to be minor, but Kelly begins work on a cold case that shocked the local community - the abduction and brutal murder of a 10-year-old girl. 

When Claire sees a car full of children careen into a river, she rushes to the rescue. But the driver, a mother named Leah Holloway, prefers to drown. For Claire and her ex, Detective Connor Parks, it doesn't add up. What would motivate a woman with a beautiful family and a successful career to resort to such unspeakable extremes? What Connor finds out confirms Claire's suspicions of something dreadful behind Holloway's picture-perfect facade: a link between the terrified mother and a serial strangler targeting Sacramento soccer moms.

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. 

FBI analyst Kassidy Bishop is assigned to the "'For You' Killer" task force after a series of sadistic murders bearing the same signature arise in different parts of the country. The homicides are both calculated and savage, occurring in different states, but bearing the same signature: the words "for you" scribbled at each crime scene. The case chills Kassidy, bringing back memories of her own encounter with a violent criminal five years earlier.

Newly divorced and with his career in jeopardy, Detective Connor Parks takes solace in the arms of a beautiful woman he meets at a bar. The next morning, Claire Fletcher is gone, leaving nothing behind but an address and a decade-old mystery. The address leads to the Fletcher family home, where Claire's siblings inform Connor that their 15-year-old sister was abducted from a city street 10 years ago and is presumed dead.