I've just finished watching the 10 episodes of 'The Terror'.
It's a gothic horror style series, which is based on the expedition involving two ships: the 'Erebus' and 'Terror' to find the NW Passage. This much is factual, as is the disappearance of the men and their ships. Three were found buried on Beechey Island, and the two ships have also recently been discovered, with 'Erebus' also being the subject of a book written by Michael Palin. The trailer is here.