Jan 1, 2025
Nina continues as Ivalo's police chief. Her son Santeri is with her. Stenius comes to ensure security for an international conference. Nina investigates a major accident that turns out to be a mass murder.
Arctic Circle
During a routine search of an old cabin in the remote and wintery back country, Finnish policewoman, Nina Kautsalo, discovers two dead prostitutes, with a third still fighting for her life. The ensuing investigation takes a surprise twist when an extremely rare and deadly virus is discovered in the surviving woman’s bloodwork. When the Finnish Bureau of Investigation takes over the case, German virologist, Thomas Lorenz is called in to assist in identifying and containing the virus. Set within the endless white expanse of the arctic circle, Nina and Thomas must rely on each other to have any hope of saving the ones they love. But what takes precedence? A deadly virus or an active serial killer?
Created by: Olli Haikka, Petja Peltomaa, Joona Tena
Season 4 Episodes
Browse every episode and jump into details.
Jan 8, 2025
They want to keep the mass murder investigation a secret. Aikio smells a burnt cart. A terrorist suspect arrives in Ivalo. The threat of terrorism, mass murder, and a brilliant comet in the sky seem to be connected.
Jan 15, 2025
Old events related to the religious sect are beginning to unravel. Nina interrogates Ossi about the past. Marita is warned about the prophecy. Aikio is shot. The police find out who is behind the mass murder.
Jan 22, 2025
Aikio's condition is serious. Nina identifies the terrorist wanted by the FBI. The motive for the mass murder is confirmed. In Ivalo Visiting astrophysicist Jonathan Sprout's life is in danger
Jan 29, 2025
Nina finds out about 40-year-old events and who the last representative of the Taimenen family is. Jarmo and Esko drive to the wilderness church. Tuomas kidnaps Santer. A desperate Nina decides to trust the guidance.
Season 4 FAQ
Quick answers about this season's release timeline and episode lineup.
When did Arctic Circle Season 4 premiere?
Arctic Circle Season 4 premiered on January 1, 2025.
How many episodes are in Arctic Circle Season 4?
Arctic Circle Season 4 has 5 episodes.
What is the first episode of Arctic Circle Season 4?
The season opens with Season 4 Episode 1, "A Distant Guest". It aired on January 1, 2025.
Go to Season 4 Episode 1