Hogfather

Hogfather is a TV movie starring David Jason, Marc Warren, and Michelle Dockery. It's Hogswatch (equivalent to Christmas) on the Discworld and the Hogfather has gone missing, requiring Death to take his place while his granddaughter...
It's the night before Hogswatch, usually a time of joy on Discworld, but there are suspicious going-on and the criminal underworld is abuzz. The beloved Hogfather - the jolly bearer of glee and pork-related gifts for children everywhere - has vanished. Suddenly, Discworld's entire mythical system is under threat. The fate of this magical time rests in the hands of a very motley group: A band of wizards headed up by a mystical university president named Mustrum Ridcully (Joss Ackland), a loyal manservant called Albert (David Jason), a level-headed governess called Susan Sto Heilt (Michelle Dockery), and her grandfather, who happens to be - Death (Marnix van den Broeke).