It’s a case unlike anything detective Mina Dabiri has seen before. A woman trapped inside a magician’s box, with swords pierced through. But this time, it’s not a magic trick. It’s murder. Knowing she has a terrifying killer on her hands, Mina enlists the help of celebrity mentalist, Vincent Walder. Only he can give her an insight into the secret world of magic and illusions. Mina and Vincent soon discover that the murder victim has the roman numeral III engraved on her leg. The killer is counting down. 

Tom Thorne has it all. In Nicola Tanner and Phil Hendricks, Thorne has good friends by his side. He finally has a love life worth a damn and is happy in the job to which he has devoted his life. He has everything to lose. Hunting the woman responsible for a series of grisly murders, Thorne has no way of knowing that he will be plunged into a nightmare from which he may never wake. And he'll do anything to keep it. Finally, Thorne's past has caught up with him and a ruinous secret is about to be revealed. If he wants to save himself and his friends, he must do the unthinkable.

In the present, an old fisherman is found dead by the shoreline and a stranger with a mission moves into a shabby Kinloch flat/ Meanwhile, D.C.I. Jim Daley is trying to help Brian Scott stay sober, and the good people of Kinloch are still mourning the death of one of their own. As past and present collide, Daley finds himself face to face with old friends and foes. Memories can only last as long as those who keep them, and ghosts will not be silenced.

A silent killer stalks the city, targeting those home alone at night—killing without pity or remorse. As panic spreads, Detective Inspector Helen Grace leads the investigation, but is herself a hunted woman, her every step dogged by a ruthless killer bent on revenge. As she tracks the murderer, Grace begins to suspect there is a truly shocking home truth that connects these brutal crimes.

DCI Mark Joesbury has been expecting this. Monitoring a complex network of dark web sites, Joesbury and his team have spotted a new terrorist threat from the extremist, women-hating, group known as 'incels' or 'involuntary celibates.' Joesbury's team are trying to infiltrate the ring of power at its core, but the dark web is built for anonymity, and the incel army is vast. Pressure builds when the team learn the snatched child was just the first in a series of violent attacks designed to terrorise women. 

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.

A serial killer is burning people alive in the Lake District's prehistoric stone circles. He leaves no clues, and the police are helpless. When his name is found carved into the charred remains of the third victim, disgraced detective Washington Poe is brought back from suspension and into an investigation he wants no part of. He is reluctantly partnered with brilliant but socially awkward civilian analyst Tilly Bradshaw, and the mismatched pair uncover a trail that only he is meant to see. The elusive killer has a plan, and for some reason Poe is part of it.

When a body of a woman is discovered at a lighthouse in the Icelandic town of Akranes, it soon becomes clear that she’s no stranger to the area. Chief Investigating Officer Elma, who has returned to Akranes following a failed relationship, and her collegues Sævar and Hörður commence an uneasy investigation which uncovers a shocking secret in the dead woman’s past that continues to reverberate in the present day.

The only witness to a shocking murder is the victim's 10-year-old daughter, Margret. The police turn to the Children's House for their expertise in childhood trauma. The manager, Freyja, doesn't much like the police - especially the detective in charge, Huldar. But she does want to help them protect Margret. And when more people die - their murders heralded by strange messages, texts, and strings of numbers - they will have to work together to crack the riddle before they become targets themselves.

Investigator Sofia Kovic has uncovered a connection between several deaths in Oslo over the last year and a half. She tries to call her superior, Alexander Blix, but before Blix has time to return her call, Kovic is shot and killed in her own home. In the apartment below, Blix’s daughter Iselin narrowly escapes becoming the killer’s next victim. Four days later, Blix and online crime journalist Emma Ramm are locked inside an interrogation room, facing the National Criminal Investigation Service. 

In 1999, 17-year-old Tone Vaterland was killed on her way home from work. Desperate for a conviction the police deemed the investigation an open-and-shut case and sent her spurned boyfriend, Danny Momrak, down for murder. But 20 years later William Wisting receives a puzzling letter. It suggests the wrong man was convicted for Tone's death and that the real murderer is still out there and could kill again.

The murders have begun. Across England, a string of murders is taking place. Each different in method, but each horrifying and brutal. Jess Ambrose is plunged into the investigation when her house is set ablaze. With her husband dead and the police pointing at her, she runs. Her only hope is disgraced detective Nate Griffin, who is convinced Jess is innocent. Soon, Jess and Griffin discover the unthinkable: this murderer is copying the world’s most notorious serial killers. And now, imitation isn’t enough. The killer dubbed the Echo Man is ready to create his own masterpiece.

A multimedia designer is hard at work. His latest computer game heralds a new era in state-of-the-art graphics. But there's only one way to ensure that the death scenes are realistic enough. In an isolated field in Philadelphia, Detective Ciccotelli's day begins with one grave, one body and no murder weapon. It ends with sixteen graves, but only nine bodies and the realisation that the killer is going to strike again. When it's discovered that the murder weapons are similar to those used in medieval torture, Ciccotelli knows he's going up against the most dangerous opponent.

Twenty years ago, Cyrus Haven's family was murdered and only he and his brother survived. Cyrus because he hid. Elias because he was the killer. Now Elias is being released from a secure psychiatric hospital and Cyrus, a forensic psychologist, must decide if he can forgive the man who destroyed his childhood. As he prepares for the homecoming, Cyrus is called to a crime scene in Nottingham. A man is dead, and his daughter, Maya, is missing. Then a second woman is abducted. The only witness is Evie Cormac, a troubled teenager with a gift for knowing when people are lying.

Detective Eira Sjödin is just old enough to remember the summer when 16-year-old Lina Stavred went missing. Her entire community was haunted by the disappearance - especially when Olof Hagström, just 14 himself, confessed to her murder. That was two decades ago. No one in their small rural community has seen or heard from him since, but the spectre of his crime lingers in the forests around the town. But now Olof is back, and he stands accused of another brutal crime.