The BEST episodes of Arctic Circle season 5
Every episode of Arctic Circle season 5, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Arctic Circle season 5!
Arctic Circle is set in the unforgiving polar region, amidst the icy landscapes of Finnish Lapland. After Nina Kautsalo, a Finnish police officer, finds a dying prostitute in an old cabin in the wilderness, the ensuing criminal investigation takes a surprise twist when a deadly virus is discovered in the prostitute's blood. However, when Thomas Lorenz, a German virologist, travels to Lapland to investigate the virus, he and Nina suddenly find themselves in the middle of an exceedingly unusual criminal investigation that ends up forcing them outside the law.
#1 - Exposure
Season 5 - Episode 1 - Aired 3/31/2026
When an ordinary Fennogrid employee stumbles upon a murder scene, she is forced into a crime with no way out. Nina launches a murder investigation, unaware that it is connected to a cyberattack that is about to begin.
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#2 - Double Trojan
Season 5 - Episode 4 - Aired 4/22/2026
Lakkala's murder is linked to a cyberattack. Alvar Saarnio's updated Ivalo backup disk is revealed to be a Trojan horse. Vagan hijacks electricity distribution: Finland goes dark one city at a time.
#3 - Outbreak
Season 5 - Episode 5 - Aired 4/29/2026
Nina investigates Ori's murder at a wilderness hotel when the suspect flees to the fells. Valentin secures Klaus Kleber's connection to the D-Team. Venla reveals Klaus's hideout.
#4 - Infection
Season 5 - Episode 2 - Aired 4/8/2026
When a cyberattack on Fennogrid is revealed, a local criminal investigation becomes entangled in a national crisis – and one wrongdoing begins to take on proportions that no one yet understands.
#5 - Antibody
Season 5 - Episode 3 - Aired 4/15/2026
The cyberattack on the Finnish electricity grid deepens. KRP and Traficom identify Poison as the perpetrator. In Ivalo, Klaus Kleber is placed under surveillance due to the D-Time connection, and Fennogrid employee Alvar Saarnio disappears.
#6 - Blackout
Season 5 - Episode 6 - Aired 5/6/2026
Nina forces Nikander to hand over Klaus to her and comes into conflict with Toni. Vaga takes Leena hostage. When the power is restored, the D-Team's identity is revealed and Nina's position as a police officer is questioned.