Christmas special episode 2017 trailer The Twelfth Doctor comes face to face with his past in his final adventure. Twice Upon A Time coming Christmas 2017. 15 August 2017 No comments Categories: season 10, video Tags: Christmas Special episode, trailer Comments Leave a Reply Click here to cancel reply. XHTML: You can use these tags: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong> This site uses Akismet to reduce spam. Learn how your comment data is processed.