Supernatural - Season 3 Episode 8 -

Sam and Dean follow the trail of an Anti-Claus when victims are apparently pulled up the chimney never to be seen again. After a lead goes nowhere, the Winchesters learn the Anti-Claus in in fact a pair of old pagan gods who have assimilated into society and have found a new way of getting their yearly sacrifices. A flashback to Christmas Eve 1991 reveals how Sam found out for the first time what their father really did and where Dean got his gold amulet.