Crozier is captain of the Terror and second-in-command on the expedition for the Northwest Passage under Sir John Franklin (Ciaran Hinds), who has the status and social grace Crozier lacks, although none of the seafaring brilliance.
Captain James Fitzjames (Tobias Menzies) is a rising star in the Royal Navy and particular friend to Sir John, but very much not a confidante to Crozier.
Jared Harris stars as Captain Francis Crozier, an incomparable sailor who is held back in the British Royal Navy due to his lack of social status and the fact that he’s an Irishman and alcoholic.
The mission to discover the Northwest Passage hits a snag when the cold becomes too much for the ships, and they’re frozen in place with no hope of movement.