Technically the (or the bridge between 8 and 9), this special is a blend of holiday cheer and sci-fi horror.
The Doctor and Clara are trapped at an Arctic base under attack by "Dream Crabs"—alien parasites that induce a dream state while devouring their victims' brains. [S3E9] Last Christmas
The title is most commonly associated with a specific episode of Doctor Who , but it is also the name of a This Is Us episode. Depending on which show you are looking for, Doctor Who: "Last Christmas " (2014 Special) Technically the (or the bridge between 8 and
To survive, the characters must navigate multiple layers of dreams, often questioning what is real—a concept critics compared to the film Inception . [S3E9] Last Christmas