Patrick Swayze is voiced by Patrick Swayze's real brother Don.
Seth MacFarlane, who voices Carter Pewterschmidt, does speak German.
When Norm MacDonald is reading ''Twas the Night Before Christmas" he gets fired and mentions how O.J. Simpson killed his wife. Norm was famously fired from SNL for constantly bringing up on Weekend Update that O.J. was guilty, despite the higher ups' disapproval.
The song the Carolers are singing at The Clam is "Jesus Child" by famous English composer, John Rutter.