Dean : So what the hell do you think we're dealing with?'A Very Supernatural Christmas' was an episode from the third season of the television series Supernatural. Series creator, Eric Kripke, is quoted as saying he wanted to make "the most violent Christmas special in the history of television". Designed to resemble a traditional Christmas special, the episode even began with a genuine vintage CBS "A Special Presentation" sequence, followed by a sentimental Christmas scene, set in Seattle, featuring a young boy and his grandfather. Of course, the tone quickly degenerated when Grandpa was dragged savagely up the chimney by some unseen force.
Sam : Actually, I have an idea.
Dean : Yeah?
Sam : Yeah. It's gonna sound crazy...
Dean : What could you possibly say that sounds crazy to me?
Sam : Um... Evil Santa.
Dean : ...Yeah, that's crazy.
The action then moved forward one year, and we discovered that the Winchester boys were investigating a string of similar Christmas murders in Michigan. At first, Sam incorrectly speculated that the perpetrator was some sort of "Anti-Claus", like the "Krampus", believed by some cultures to be a devilish companion to Saint Nikolaus. However, while Saint Nikolaus hands out gifts and sweets, the Krampus hands out punishment to naughty children.
The real culprits turned out to be a pair of pagan winter solstice gods masquerading as the picture-perfect, Christmas-loving suburban couple, Madge and Edward Carrigan. When the Carrigans captured the boys, Sam and Dean found themselves being prepared as a sacrifice. The sacrificial ritual included, what I believe, was the most wince-inducing scene of the entire series, when we got a close-up shot of Sam's fingernail being torn off.
In order to maintain the feel of a "cheery, traditional Christmas special" this episode dispensed with the series trademark classic-rock soundtrack, opting instead for traditional Christmas songs. One of the funniest scenes in the episode was when Sam and Dean burst in on a sleazy amusement park Santa, whom they wrongly suspected of being an Anti-Claus, only to find him indulging in booze and porn. In an attempt to cover their mistake, the boys broke into an impromptu rendition of 'Silent Night' with Bad Santa swaying along.
The story arc for Season 3 of Supernatural involved Dean having to face the consequences of selling his soul to a crossroads demon in order to save Sam's life. Hoping to celebrate his last Christmas with his brother, before going to Hell, Dean was disappointed when Sam was unwilling to participate. The episode was interspersed with flashbacks to a bleak Christmas from the brothers' childhood, which explained Sam's distaste for the Yuletide season.
The episode ended on a poignant note with Sam having a change of heart and the two brothers sharing a simple Christmas, exchanging gifts bought at a local gas station, and watching the football game with eggnog.