Dublin's notorious Canal Killer is 10 years into his life sentence when a body is fished out of the Grand Canal. Detectives suspect a copycat is emulating the crimes, and they must turn to Ireland's most prolific serial killer for help. Will admits he has the information the cops need but will give it to only one person.... When Alison Smith gets the request from Dublin, she is pulled back to face the man she's worked so hard to forget.

Four people walked into the dining room that night. One would never leave. Matthew: the perfect husband. Titus: the perfect son. Charlie: the perfect illusion. Rachel: the perfect stranger. Charlie didn’t want her at the book club. Matthew wouldn’t listen. And that’s how Charlie finds himself slumped beside his husband’s body, their son sitting silently at the dinner table, while Rachel calls 999, the bloody knife still gripped in her hand.

Elodie Fray wants to be more like her perfect sister, Ada, the one her parents are actually proud of. When she decided to quit her job and pursue her dream of becoming an author, she thought it would be her time to shine, but a year on nothing has happened. And she's getting desperate. When Elodie makes one small mistake on a drunken night with a friend, things quickly spiral and suddenly everyone believes she has a book deal. Unable to find a way back from her little lie, her perfect dream becomes a perfect nightmare - and desperate times call for desperate measures.

Fifty-six days ago. Ciara and Oliver meet in a supermarket queue in Dublin and start dating the same week COVID-19 reaches Irish shores. Thirty-five days ago. When lockdown threatens to keep them apart, Oliver suggests they move in together. Ciara sees a unique opportunity for a relationship to flourish without the scrutiny of family and friends. Oliver sees a chance to hide who - and what - he really is. Today. Detectives arrive at Oliver's apartment to discover a decomposing body inside.

The day Adam Dunne's girlfriend, Sarah, fails to return from a business trip to Barcelona, his life begins to fall apart. Days later, the arrival of her passport and a note that reads, 'I'm sorry - S' sets off real alarm bells. Adam is puzzled when he connects Sarah to a cruise ship called The Celebrate and to a woman who disappeared in eerily similar circumstances. Adam must try to outwit a predator who seems to have found the perfect hunting ground....

Susannah has two beautiful daughters, a high-flying medical career, a successful husband and an enviable life. Her hair is glossy, her clothes are expensive: she truly has it all. But when—on the hottest day of the year—her strict morning routine is disrupted, Susannah finds herself running on autopilot. It is hours before she realises she has made a devastating mistake. Her baby, Louise, is still in the backseat of the car, and it is too late to save her.

Welcome to No.12 rue des Amants. A beautiful old apartment block, far from the glittering lights of the Eiffel Tower and the bustling banks of the Seine. Where nothing goes unseen, and everyone has a story to unlock.

Marissa Irvine arrives at 14 Tudor Grove, expecting to pick up her young son Milo from his first playdate with a boy at his new school. But the woman who answers the door isn't a mother she recognises. She isn't the nanny. She doesn't have Milo. And so begins every parent's worst nightmare. As news of the disappearance filters through the quiet Dublin suburb and an unexpected suspect is named, whispers start to spread about the women most closely connected to the shocking event. Because only one of them may have taken Milo - but they could all be blamed.

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?

Detective Laura Shaw seems to have it all: a supportive husband, a happy two-year-old and a great career. She is her team's top interviewer, brilliant at coaxing victims to open up. Then, she meets Jenny - a 14-year-old assault victim - and the façade crumbles. Jenny's stepfather is missing, the blood on her clothes is not her own and Laura can't interpret the fairy tale she keeps repeating. But Jenny isn't the only one with secrets.

He is her husband. She is his captive. Her husband calls her Jane. That is not her name. She lives in a small farm cottage, surrounded by vast, open fields. Everywhere she looks, there is space. But she is trapped. No one knows how she got to the UK: no one knows she is there. Visitors rarely come to the farm; if they do, she is never seen. Her husband records her every movement during the day. If he doesn't like what he sees, she is punished. For a long time, escape seemed impossible. But now, something has changed. She has a reason to live and a reason to fight. 

Nell Sweeney has led an ordinary life. Every day, she walks to and from the hospital where she works as a nurse, believing that no harm can befall her. Until one day she is taken. Because someone out there has a secret. Someone out there has been watching Nell - and they’ve been watching others like her, too. Nell is the unlucky one - she was in the wrong place at the wrong time. And if she isn’t found soon, someone will make sure that she isn’t the last woman to be taken.

One February afternoon, Detective Ray Flowers' life is blown apart by a petrol bomb attack. No one can tell him who did it. Or why. Anchorless and alone, he moves to his aunt's country cottage. What he needs is perspective. Instead, he is tormented by visions of Kitty Hallam, a troubled young woman accused of witchcraft. Back in 1643. Is she a figment of Flowers' imagination or something more? Whatever the truth, Flowers can't help but be drawn into Kitty's world, sensing their stories are intertwined somehow.

Twenty-one years ago, Dr Richard Carter and his wife, Pamela, were killed in what has become the most infamous double murder of the modern age. Their 10-year-old daughter - nicknamed the Angel of Death - spent eight years in a children’s secure unit and is living quietly under an assumed name with a family of her own. Now, on the anniversary of the trial, a documentary team has tracked down her older sister, compelling her to break two decades of silence.

Within a maze of true crime books that tend to provide only minor portions of the whole story, Serial Killers 101 provides a much more detailed and comprehensive insight into the world of some of the most infamous serial killers in American history.