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.

RELATED: New "Downton Abbey" Trailer Will Make You Feel Things
RELATED:  "Downton Abbey" Food Truck Hits NYC Next Week

[via EW]