After a crew member's death, the team faces a perilous blizzard, encounters the enigmatic Ancestor, and confronts an internal threat amidst the harrowing conditions.

Cast: Iain Glen, Emily Hampshire, Martin Compston, Rochenda Sandall, Owen Teale, Stuart McQuarrie, Molly Vevers, Abraham Popoola, Nikhil Parmar, Ross Anderson, Phil McKee, Johannes Roaldsen Fürst, Jacob Fortune-Lloyd, Hiftu Quasem, Neshla Caplan, Alice Krige, Mark Addy, Saskia Ashdown