Here's The Teaser For "Downton Abbey's" Christmas Special

Downton Abbey's fourth season doesn't premiere on this side of the pond until next month, but it's already wrapped up in the UK, just in time for the annual two-hour Christmas special. ITV just released a trailer for the event—which features the return of Shirley MacLaine—but since it follows season four, it is technically spoiler-filled. Watch at your own risk.