“The family receive a warm welcome at Duneagle Castle, visiting Rose and her parents in the Highlands. But there is no disguising the tensions between their hosts.
“Carson is determined to keep the servants back at Downton working hard, but with a country fair coming up, will some be tempted to push their luck?
“Could romance be on the cards for Mrs Patmore?”
The 2-hour special will air at 8.45pm on Tuesday 25 December on ITV1.
A fourth series and Christmas 2013 special were confirmed by ITV last month.
Are you looking forward to the Christmas special? Let us know below…
> Buy the complete Series 1-3 boxset on Amazon.
Watch the Series 3 trailer…