FBI Special Agent Katie Winter is no stranger to frigid winters, isolation, and dangerous cases. With her sterling record of hunting down serial killers, she is a fast-rising star in the BAU, and when a woman is discovered in the middle of a frozen lake, Katie is the natural choice to partner with Canadian law enforcement to track the killer across the brutal and unforgiving landscape.

FBI Special Agent Taylor Sage has crossed the country and transferred to her dream job with the BAU at Quantico. With a new job, a new house, and her husband by her side, Taylor is ready to put the darkness of her past behind her: a sister who vanished when she was a teenager.

A notorious stretch of highway is rife with serial killers, unsolved murders and missing-persons cases. The FBI, knowing it must crack this Bermuda Triangle of death, assigns its most brilliant mind—and flawed agent—Rylie Wolf, to dive headfirst into this road of danger. Rylie must tap her brilliant instincts to decode these cases and enter the twisted mind of killers—while battling demons from her own dark past.

FBI Special Agent Maya Gray, 39, has seen it all. She’s one of BAU’s rising stars and the go-to agent for hard-to-crack serial cases. When she receives a handwritten postcard promising to release 12 kidnapped women if she will solve 12 cold cases, she assumes it’s a hoax.

FBI Special Agent Ruby Hunter wants nothing more than to put the 13 killer, and her days in the FBI, behind her, and to try to pick up the pieces of her life. But he refuses to rot quietly. Ruby realizes she must do the thing she dreads the most: Visit him in prison. But he is diabolical and cunning, an expert at toying with his victims—and with her.

Tracy Crosswhite has spent 20 years questioning the facts surrounding her sister Sarah’s disappearance and the murder trial that followed. She doesn’t believe that Edmund House - a convicted rapist and the man condemned for Sarah’s murder - is the guilty party. Motivated by the opportunity to obtain real justice, Tracy became a homicide detective with the Seattle PD and dedicated her life to tracking down killers.

When a man is shot in the head, Bree Taggert and her new partner, veteran detective Dana Romano, respond to the call. They break the news to the victim’s ex-wife and learn the estranged couple’s five-year-old daughter was supposed to have been with him. What starts as a murder investigation quickly morphs into a desperate search for a missing child. The case stirs memories of Bree’s own traumatizing childhood. To find the little girl, Bree will have to relive her own terrifying past.

Harley, reeling from her being put on leave, from her long-term relationship falling apart, and from her father’s dying, is hardly ready to return to her hometown, to its long-buried secrets, and her tortured past. She spent her life escaping this small town—but, as she settles back in, she wonders: Might she have been wrong all this time? Yet as more bodies surface and as every clue leads to a dead end, Harley, clashing with her new partner, realizes she’s in a race against time.

In Watching, 22 year old psychology major - and aspiring FBI agent - Riley Paige finds herself in a battle for her life as her closest friends on campus are abducted and killed by a serial killer. She senses that she, too, is being targeted - and that if she is to survive, she must apply her brilliant mind to stop the killer herself. When the FBI hits a dead end, they are impressed enough by Riley’s keen insight into the killer’s mind to allow her to help.

When Nigel Baxter, a middle-aged married banker with an unremarkable past, is found dead in the bath of a plush hotel suite, his wrists slit, it looks as if he's taken his own life. At first. But when Detective Inspector Daniel Riley is assigned to the case, he soon realises all isn't as it first appears to be. When a postmortem shows Baxter was poisoned, Riley suspects foul play. And then there's the odd addition of a teddy bear left at the crime scene....

In ONCE GONE, women are turning up dead in the rural outskirts of Virginia, killed in grotesque ways, and when the FBI is called in, they are stumped. A serial killer is out there, his frequency increasing, and they know there is only one agent good enough to crack this case: Special Agent Riley Paige. Riley is on paid leave herself, recovering from her encounter with her last serial killer, and, fragile as she is, the FBI is reluctant to tap her brilliant mind. Yet Riley, needing to battle her own demons, comes on board, and her hunt leads her through the disturbing subculture of doll collectors, into the homes of broken families, and into the darkest canals of the killer’s mind. As Riley peels back the layers, she realizes she is up against a killer more twisted than she could have imagined.

Ten years ago in California, Daniel Pell, a self-styled Charles Manson, was sentenced to life in prison for murdering an entire family: husband, wife, and two children, plus one of his young male followers. He is brought to Salinas, California, to interview with Kathryn Dance after he is implicated in yet another killing. Things go terribly wrong during an interview break, and Pell escapes, intent on killing again.

FBI Special Agent Matthew Roarke is closing in on a bust of a major criminal organization in San Francisco when he witnesses an undercover member of his team killed right in front of him on a busy street, an accident Roarke can't believe is coincidental. His suspicions put him on the trail of a mysterious young woman who appears to have been present at each scene of a years-long string of accidents and murders, and who may well be that most rare of killers: a female serial.

It’s been five years since Detective Amanda Steele’s life was derailed by the tragic death of her young daughter. The small community of Dumfries, Virginia, may have moved on, but Amanda cannot. When the man who killed Lindsey is found murdered, she can’t keep away from the case.

DS Whitney Walker wants a promotion, but it’s hard when she’s trying to balance motherhood with a career. When a newborn baby is kidnapped from the local hospital, she draws on her skills as a mother to help. Despite being ordered not to, and when the leads are going nowhere, Walker enlists the help of a local journalist who’s convinced it’s the work of an international baby smuggling ring. Walker’s plan backfires and she fears they’re running out of time.