Doctor Who's Christmas Specials are often one of the biggest highlights of the festive season. Landing just two weeks after "The Giggle's" conclusion, "The Church On Ruby Road" will be an essential watch for Doctor Who fans. Following a period of Christmas episodes airing on New Year's Day, audiences are thrilled to see that Doctor Who is returning to Christmas Day, and discussing which episodes are best to watch in preparation for "The Church On Ruby Road."
Source:https://www.cbr.com/doctor-who-story-guide-the-church-on-ruby-road/