When everyone in South Park decides to forgo presents and celebrate a non-materialistic holiday season, the boys try to bring the spirit of commercialism back to Christmas by making an animated film.
Did You Know?
Originally South Park started as two animated shorts, both named "The Spirit Of Christmas", clips of which could be seen in the original opening title sequence on screens they passed (the title sequence used until this season's "4th Grade"). The first featured Baby Jesus battling an evil Frosty, the second featuring an adult Jesus fighting Santa. In this episode, the boys make the latter version as their special. This episode depicts the difficulties Matt Stone and Trey Parker had when making the original shorts. See more
When Kyle asks Stan to try and do Cartman's voice, Stan has a script in his hand. Next frame Stan has no script, then Kyle gives one to Stan. See more
[about Butters' cutouts of the boys
Of course, Stan's got blue eyes and I have a sharper nose, but these are pretty close!
References The Spirit of Christmas