After an exhausting and traumatic search, at some personal cost, the local police are finally close to solving the murder that set off the string of terrible events in their little town.

The true identity of the killer is revealed and Andri and Hinrika face a race against the clock to protect the people they love.

Captain Carlsen agrees to work with the police. On the ferry, it transpires that one crew member has something to hide.

Having found the key to the padlock of Hrafn's shed, Andri has a definitive clue to the identity of the murderer - but it's not who he was expecting. The identity of the killer will send shockwaves through the town and Andri faces some very difficult decisions.

Now that Thorhildur has given the police the lead they need, Andri must get her out of town before the killer finds out what has happened.

The weather is finally improving and the investigation team from Reykjavik arrives. It seems as though real progress is going to be made. But are some things just too good to be true?

The polluted lake has been discovered and the town's water supply has been turned off to prevent further cases of sickness. Andri and Hinrika are chasing up leads all over town.

Kristján is questioned about his alibi. Andri spots a well-placed security camera. At the wake, the truth behind Ívar's and Lína's deaths is unveiled.

Following a shocking attack on a politician in Reykjavik, Chief of Police Andri makes a return to his rural hometown, a place where the dark events of the past still haunt him.

The arrival of biker-gang reinforcements from Denmark rattles and divides the cult. The police learn how Ívar, the bikers and the cult are connected.

Andri and Hinrika suspect that two young local farmers, Torfi and Skuli, are implicated in Finnur’s murder.

In a small Icelandic fishing port, a ferry docks. That same day a dismembered body is found in the river, sparking an investigation and a call to Reykjavik for detective reinforcements to assist the small local police force. With the ferry held in dock and a bad snowstorm threatening to cut off the town, chief of police Andri is under pressure to deliver results quickly.

When a cult member is found murdered in a cave, Andri learns he's the same young man he'd been convinced was guilty of a woman's 2013 disappearance.

The police have foiled a terrorist plot but they’re left no closer to having solved the mystery of who killed Finnur, or why Gisli took the actions he did.

With no police support able to arrive from Reykjavik until the snowstorm clears, Andri and his colleagues need to work fast. It seems a hopeless situation, but with a suspect in custody awaiting questioning and a body awaiting forensic tests Andri is desperate for them to prove themselves and make a breakthrough in the case.

To get proof of Hopper's connection to the drugs, Sonja sends Sverrir as a mole to the biker gang's warehouse, where Hopper tests his trustworthiness.