After a transformation in the 60th-anniversary special episodes, the Fifteenth Doctor encounters Rub
After a transformation in the 60th-anniversary special episodes, the Fifteenth Doctor encounters Ruby Sunday, a 19-year-old, during a Christmas adventure. Together, they encounter familiar faces like Kate Stewart and Mel Bush, while also meeting a peculiar character from the 1960s and a mysterious duchess. The episodes follow the Doctor and Ruby as they explore new worlds and encounter intriguing characters.