When researchers suddenly disappear, Liz Danvers orders a search but tempers expectations of finding the men whilst Navarro tries to convince a sceptical Danvers that there is a connection to the murder of local activist Annie Kowtok.
Danvers and Prior set out to learn more about Tsalal and find an unlikely location for the physical evidence. Meanwhile, Captain Connelly threatens to move the case to Anchorage, and Navarro and Danvers separately find a connection.
While Hank leads the search for Clark, Prior asks Danvers about the murder-suicide case that drove a wedge between her and Navarro, who goes with Danvers to seek out a local hairdresser for insight on Annie.
Julia is struggling with mental health problems again. Navarro takes her to a clinic. Danvers and Navarro find the crime scene where Annie was murdered.
Prior investigates the links between the research station and the mining company Silver Sky. Navarro rescues Leah as a protest demonstration escalates.
Danvers and Navarro are trapped on the research station during a storm, without power or connection to the outside world. They have to face the demons of their past.
Colin Farrell
Detective Ray Velcoro
Rachel McAdams
Detective Ani Bezzerides
Vince Vaughn
Frank Semyon
Taylor Kitsch
Officer Paul Woodrugh
Kelly Reilly
Jordan Semyon