Oslo, New Year’s Eve. The annual firework celebration is rocked by an explosion, and the city is put on terrorist alert. Police officer Alexander Blix and blogger Emma Ramm are on the scene, and when a severely injured survivor is pulled from the icy harbour, she is identified as the mother of two-year-old Patricia Smeplass, who was kidnapped on her way home from kindergarten 10 years earlier and never found. Blix and Ramm join forces to investigate the unsolved case.

Someone has to die.... Henning Juul sits in a boat on a dark lake. A man with a gun sits opposite him. At the man's feet is a body that will be soon be dumped into the water. Henning knows that the same fate awaits him. And he knows that it's his own fault. Who started the fire that killed Henning's young son? How is his sister, Trine, involved? Most importantly, who can be trusted?

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. 

Stavern, 1983. After a brutal robbery, a young policeman named William Wisting is edged off the investigation by more experienced officers, but soon he is on another case that has not even been recognised as murder. Forgotten in a dilapidated barn stands a bullet-riddled old car, and it looks as if the driver did not get out alive. This case will shape William Wisting as a policeman and give him insight that he will carry with him for the rest of his career.

Sixteen-year-old Jenny Lind is kidnapped in broad daylight on her way home from school and thrown into the back of a truck. She’s taken to a dilapidated house, where she and other girls face horrors far beyond their worst nightmares. Though they’re desperate to escape, their captor foils every one of their attempts. Five years later, Jenny’s body is found hanging in a playground, strung up with a winch on a rainy night.

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?

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.

Seventeen years ago, Criminal Inspector Ewert Grens was called to the scene of a brutal crime. A family had been murdered, and the only survivor - and witness - was the five-year-old daughter. The girl was placed in the witness protection program, and the case went cold, but years later, Grens is still haunted by the seemingly random slaying and the little girl who was spared. So when he learns that the apartment where the crime occurred is now the scene of a mysterious break-in, Grens immediately fears that someone is intent on silencing the only witness.

A frozen body is discovered in the icy depths of Langjökull glacier, apparently that of a businessman who disappeared 30 years before. At the time, an extensive search and police investigation yielded no results - one of the missing man’s business associates was briefly held in custody, but there wasn’t enough evidence to charge him.

Criminologist Martin Knight lives a gilded life and is a thorn in the side of the police. But then his wife, Liz, goes missing. There is no good explanation and no sign of Martin.... To make things worse, Liz is the ex-girlfriend of DCI Craig Gillard who is drawn into the investigation. Is it just a missing person or something worse? And what relevance do the events around the shocking Girl F case, so taken up by Knight, have to do with the present? The truth is darker than you could ever have imagined.

Carl Mørck used to be one of Denmark’s best homicide detectives. Then a hail of bullets destroyed the lives of two fellow cops, and Carl - who didn’t draw his weapon - blames himself. So a promotion is the last thing he expects. But Department Q is a department of one, and Carl’s got only a stack of cold cases for company. His colleagues snicker, but Carl may have the last laugh, because one file keeps nagging at him: A liberal politician vanished five years earlier and is presumed dead. But she isn’t dead...yet.

DS George Cross can be rude, difficult and awkward with people. But his unfailing logic and dogged pursuit of the truth means his conviction rate is the best on the force. So when his police colleagues dismiss the death of a man as a squabble among Bristol's homeless community, Detective Sergeant George Cross is not convinced.

Detective Sergeant Chris Waters got the call at 05.29 that July morning. This is it, said DCI Reeve, you'll be first there, it's all yours, you're the crime scene manager. Suddenly, after months of waiting and wondering, Waters finds himself in at the deep end, and alone at the scene of a puzzling murder. As the investigation proceeds, the detectives at Kings Lake Central find themselves visiting familiar places and talking to some familiar faces, while old enmities reappear in the incident room. Before this is over, Chris Waters will need to make a career-changing decision.

The police find out about the crime the way everyone does: on Snapchat. The video shows a terrified young woman begging for forgiveness. When her body is found, it is marked with a number “2”. Detective Huldar joins the investigation, bringing child psychologist Freyja on board to help question the murdered teenager's friends. Soon, they uncover that Stella was far from the angel people claim, but who could have hated her enough to kill? Then another teenager goes missing, more clips are sent to social media, and the body with a “3” is found. Is there an undiscovered body with “1”?

It’s been more than 20 years since Olof Hagström left home. Returning to his family’s house, he knows instantly that something is amiss. The front door key, hidden under a familiar stone, is still there. Inside, there’s a panicked dog, a terrible stench, water pooling on the floor: The father Olaf has not seen or spoken to in decades is dead in the bathroom shower.