One part of the ending that I didn't like was that it very quickly breezed past a lot from the novel, which I suppose makes sense because it would have been at least half an episode of content. There's a prolonged period of recovery for Crozier during which time he bonds closely with Lady Silence and they become lovers. And by removing that part of the story, the TV show makes it seem like Crozier's making an illogical decision to stay in hiding rather than the more emotional tone of him finding a new home and a place where he belonged.

Part of the story that is also developed more in the novel is that Crozier isn't really that well respected as an Irishman under English rule. He's clearly a very capable leader and has the respect of his men, but that's earned respect. Compare that to the expedition leader, Sir Franklin, who is... a moron. It's a long-running theme of incompetence in confidence, and Sir Franklin does not have the respect of the place they are in yet he is in command. But Crozier finds a place amongst the Inuit, who don't seem to treat him as a lesser man, just a man.