Writer:	Trey Parker
Star:	Trey Parker (Voice of Stan Marsh; Eric Theodore Cartman; Herbert Garrison; Officer Barbrady; Terrance; Timmy; Ned Gerblanski; Satan; Randy Ma),  Matt Stone (Voice of Kyle Broflovski; Kenny McKormick; Gerald Broflovski; Pip Pirrup; Jesus; Jimbo Kearn; Phillip; Saddam; Various Others),  Mary Kay Bergman (Voice of Wendy Testaburger; Liane Cartman; Sheila Broflovski; Sharon Marsh; Mrs. McKormick; Mayor McDaniels; Ms. Crabtree; Princ),  Isaac Hayes (Voice of Jerome "Chef" McElroy)
Recurring Role:	Jennifer Howell (Voice of Bebe)
Guest Star:	Jesse Howell (Voice of Ike)

After this episode aired, John Kricfalusi, of Ren and Stimpy fame, accused Stone and Parker of ripping off a character from his George Liquor flash cartoons nammed "Nutty, the Friendly Dump". However, the court ruled out the case as "too ridiculous". Ironically, the episode actually featured a reference to Ren and Stimpy when Mr. Mackey calls Kyle a "sick little monkey". (edit) During the pre-episode intro on the DVD and video this episode was on, Trey Parker explained that Mr. Mackey was inspired by the school counselor he had in junior high. (edit) This is the first episode where Kenny did not die. (edit) First apperence of Mr Hankey. (edit) According to "Goin Down To South Park", Mr. Hankey was inspired by an event which happend with Trey Parker. When Trey was a kid, he had the habbit of not flushing the toilet, because of this, Trey's dad told him that if he didn't flush the toilet, Mr. Hankey would come out and eat him. (edit)

Cartman: How bout we sing, "Kyle's Mom is a Stupid Bitch," in D-minor?
Kyle: I told you not to call my mom a bitch Cartman! (edit) Cartman: How about we sing "Kyle's mom's a bitch" in A-Minor? (edit) (Talking about Kyle's mom)
Cartman: Oh, boy! Superbitch is at it again! (edit) Stan: Hey come on guys. We have to go to the mall and tell Santa Claus what we want for Christmas.
Cartman: Yeah. We'll see you later, Kyle. Guess there's no reason for you to come, since you don't get Christmas presents.
Kyle: No, but I get Channukah presents for eight days.
Cartman: Too bad it's usually a dreidel or something lame like that.
(edit) Cartman: Oh dude! Kyle's mom is here to ruin Christmas!
Kyle: Shut up, fat boy!
Cartman: I'm not fat, I'm festively plump.
(edit)

At the end of the episode the credits quickly cut off and shows a scene Of Jesus inside the Public Access Station. He is in a room alone, singing happy birthday to himself. He then blows out the candles and the credits continue. The fact that no one is there acknowledges that everyone in town forgot that Christmas is Jesus's birthday. This could possibly be what Stan believed they were forgetting, as when Kenny dies they see it as 'unexpected'. (edit) This episode was the debut for Three popular South Park songs including "Mr. Hankey, the Christmas Poo", "Kyle's Mom is a Stupid **** and "The Lonely Jew on Christmas", which are all repeated in later episodes. (edit) This is the first time that Cartman sings the song "Kyle's mom is a Stupid Bitch." He doesn't sing it again until the movie South Park: Bigger, Longer and Uncut. (edit) They made an album of songs from this episode. (edit) Mr Mackey calls Kyle a "Fecophiliac" for his apparent obsession for feces. The correct term is a coprophiliac. (edit)

One Froggy Evening:

Many of the plot devices surrounding Mr. Hankey (him being carried around in a box, his coming to life in the presence of only Kyle and subsequent inactivity in the presence of others to the point that Kyle eventually is forced to enter an asylum) are very similar to those surrounding Michigan J. Frog in the classic animated short One Froggy Evening. (edit) Ren and Stimpy:

During the scene where Mr. Mackey finds a turd in his coffee he calls Kyle a "sick little monkey". This is an insult which is used in the animated comedy Ren and Stimpy. (edit) A Charlie Brown Christmas:

The episode opens with Stan arriving on the stage and reciting the story of the birth of Jesus from the Gospel of Luke, this is very simular to what Linus did in the famous "A Charlie Brown Christmas" special. The snowflake-eating scene is also a reference from Peanuts. (edit) Mr. Potato Head:

The Mr. Hankey Playset is very similar to Mr. Potato Head. Utilizing eye, nose, lip, and arm pieces, you create your own play toy. (edit) King Kamehameha:

King Kamehameha was referenced in Cartman's song about Kyle's mother was the greatest of the Hawaiian kings. (edit)