Hogfather is a two part mini-series based on the infamous Terry Pratchet's Discworld
series of novels. Discworld is a world very different then ours; it is flat. It is a disk that is supported on the backs of four elephants that stand on the shell of a giant turtle swimming through space. Despite the huge difference however Discworld has many similarities to our own world. They have Toothfairies, Boogiemen and even their very own version of Saint Nicolas named Hogsfather.
The Auditors, a group of all-seeing public servants, has seen belief as something non-existent and therefore must be removed from creation. They hire the Assassin's guild to kill the Hogfather on the eve of Hogswatch. The assassin's guild tap the very creepy Teatime (Teh-ah-tah-meh) to do the deed. DEATH
(think the personification of the Grim Reaper) knows how bad this would be for reality and takes the place of the Hogfather, delivering presents to all the good little boys and girls to foster belief while trusting in his half-mortal granddaughter Susan to discover the plot to kill the Hogfather before dawn on Hogswatch day. For if she doesn't succeed, the sun will not rise, and the universe will simply cease to be.