Downton Abbey
A full list of special holiday episodes
Set in the early 1900s, this period drama follows the lives of the aristocratic Crawley family and their servants as they navigate the changing times and societal shifts in England.
The show aired 4 Christmas episodes.
Christmas episodes:

Season 2, Episode 9
Christmas at Downton Abbey
At a Christmas party in 1919, tensions rise at Downton Abbey following Bates' arrest, despite the festive atmosphere.

Season 3, Episode 9
A Journey to the Highlands
The Crawleys travel to Duneagle Castle to spend Christmas with the MacClares. When they return home, a tragedy occurs that threatens to change their lives forever.

Season 5, Episode 9
A Moorland Holiday
Autumn of 1924 has arrived, and the Crawley family is invited to a grouse shooting party in Northumberland by Rose's father-in-law.

Season 6, Episode 9
Christmas Special
Mary tries to reconcile with her sister and Edith's secret still looms. Henry struggles to find his place at Downton as a stepfather.