Last Christmas | [s3e9]

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.

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

It famously guest-stars Nick Frost as a surprisingly capable and "real" Santa Claus who helps the Doctor save the day. The Doctor and Clara are trapped at an

The episode serves as a reconciliation between the Twelfth Doctor and Clara, cementing their bond before they head into the high-stakes adventures of Series 9. This Is Us: "Last Christmas " (S1E10) [S3E9] Last Christmas