10 episodesFirst aired 26 March 2018
A Royal Naval expedition voyages into unchartered territory as the crew attempts to discover the Northwest Passage. Faced with treacherous conditions, limited resources, dwindling hope and fear of the unknown, the crew is pushed to the brink of extinction.
E1Mar 201844m
An accident at sea cripples a Royal Navy expedition 200 miles from finding the Northwest Passage, forcing its captains to make dire choices.
E2Mar 201841m
After a long winter trapped in the ice, scouting parties are sent out in search of open water. One of the teams makes a frightening discovery.
E3Apr 201841m
With something now stalking the ships, the captains debate their options, testing their loyalty to one another against their duty to their crews.
E4Apr 201845m
A cunning attack on the ships proves the men are not battling an ordinary bear and that the region's Inuit culture may hold a key to their survival.
E5Apr 201841m
A strange illness begins to show itself while another more familiar one jeopardizes the expedition's most valuable resource: its captain's judgment.
E6Apr 201845m
With the end of their provisions in sight, officers contemplate a tough, risky strategy while struggling to raise the men's worsening spirits.
E7Apr 201845m
As the men make new attempts to find rescue, a series of shocking events underscores how vulnerable and exposed their situation has become.
E8May 201845m
Deaths under mysterious circumstances create paranoia among the men, and some of the crew may be considering mutiny.
E9May 201854m
Hope comes in strange forms, and the question of what the men are willing to do to survive begins to be settled in both noble and horrifying ways.
E10May 201852m
The expedition's epic journey reaches its climax as men find themselves in a final confrontation with the Inuit mythology they've trespassed into.