“A Mercy” is the sixth episode of the TV show “The Terror”, an adapatation of a novel by Dan Simmons with the same title, and follows “First Shot a Winner, Lads”.

Note. This article contains spoilers about “A Mercy”.

Captain James Fitzjames (Tobias Menzies) wants to abandon the Erebus and Terror with all the survivors to try to walk to safety. To try to improve the men’s morale, he decides to have a masked party on ice. Dr. Henry Goodsir (Paul Ready) finds further evidence that they all risk lead poisoning but Dr. Stephan Stanley (Alistair Petrie) doesn’t seem to pay any attention to him.