The isolated community of Fortitude in the Arctic Circle has never been the scene of a violent crime, so news of a murder rocks the residents. Sheriff Dan Anderssen investigates alongside newly arrived British detective Eugene Morton, while the killing is a disaster for Governor Hildur Odegard's plans to market Fortitude as an upmarket tourist destination.
As the chilling thriller continues, Sheriff Anderssen and the police close in on their murder suspect, while DCI Morton follows a different line of enquiry.
Dan and Frank go in search of a suspect; however, Dan's feelings for Elena are threatening to overwhelm him. Morton, meanwhile, uncovers a new piece of evidence.
Following Dan's loss of control, Morton takes over the murder investigation. Elsewhere, Elena's mysterious past is about to catch up with her
Shock waves reverberate around Fortitude as the killer is revealed, while Morton tunes his attention to the death of a scientist on the island months earlier.
While Morton uncovers new information about the death of Billy Pettigrew, Hildur makes a heart-breaking discovery. Another gruesome event occurs in Fortitude.
Panic sweeps through Fortitude as news of the second attack spreads. Dan and Morton must work together while Frank hopes the latest events will exonerate Liam
Frank takes the law into his own hands in a bid to clear Liam's name, while Morton realises Henry may have vital information about Pettigrew's death. A polar bear carcass arrives at the research centre's lab and as Vincent and Natalie analyse the corpse, they develop a theory about the recent events in Fortitude, which they feel compelled to share with Hildur and Dan
DCI Morton pursues Henry Tyson into the Arctic wilderness in search of the truth, while worrying test results force Governor Odegard to take drastic action
Dan races into the frozen wilderness to locate Henry and Morton, but he is forced to reveal the truth surrounding the death of scientist Billy Pettigrew. Back in Fortitude, Natalie has a disturbing encounter with Jason, whose behaviour is becoming increasingly bizarre, while her and Vincent's investigation leads to a particularly strange development in the inquiries into recent events.
Vincent's investigation leads him into a life-threatening situation, while Markus offers an alternative theory on what is plaguing Fortitude. Dan and Hildur launch a desperate hunt for Jason as the need to locate the mammoth carcass escalates and Eric and Yuri go head to head out in the wilderness. With events taking an unexpected turn in the Arctic community, Sheriff Anderssen must make a devastating decision.
As the remote Arctic town struggles with government cuts and a missing sheriff, a chilling discovery proves that the horror isn't over for the locals.
Governor Odegard is presented with devastating news as Sheriff Dan struggles for his life, and a new threat makes its presence known.
Natalie and Vincent head out into the wilderness and the police track down their suspect, but a dark turn of events leads them to question everything.
Eric struggles to keep control as the body count increases. Meanwhile, Natalie and Vincent's field trip descends into chaos.
A disturbing challenge is issued. Michael finds a glimmer of hope for Freya, while Vincent's trust in Natalie is shattered.
Dr. Khatri attempts to cover her tracks when Michael presents the scientists with a miracle. Dan and Elena relive their trauma.
Michael finds something unexpected on the tundra, and Dan is confronted with what he is becoming, just as a heartbreaking discovery changes the town forever.
As the town attempts to come to terms with the recent tragedy, Petra and Ingrid seek the truth. Meanwhile, Dr Khatri moves a step closer to achieving her goal.
Dan faces his toughest battle yet as someone makes the ultimate sacrifice for the greater good, while Michael and Ingrid venture out in search of justice.
The people of Fortitude take matters into their own hands. Dan seeks his own vengeance, but is there still a demon among the herd?
Oslo send two new officers to attempt to make some sense of the anarchy in Fortitude, and Dan Anderssen continues his descent into madness, bringing him face to face with a grief-stricken Michael Lennox.
A survivor of the deadly parasite makes a connection with Michael, but things take a violent turn. Meanwhile, Dan continues to lose his grip on reality.
Michael hunts for the place he was held captive, and makes a shocking discovery. Annie Burgess arrives in Fortitude looking for answers.
Michael sacrifices everything for a possible future with Elsa. As his violent deeds catch up with him, Dan realises he will never leave Fortitude.
Take a peek at Sky Atlantic's much anticipated thriller featuring an all-star cast including Christopher Eccleston, Michael Gambon and The Killing's Sofie Grabol.
