The archival footage of Bing Crosby singing "Little Drummer Boy" was taken from "The Bing Crosby Show" which aired on ABC on December 24, 1962. This was the first color special that aired on ABC. Until recently only a B&W kinescope of the show was known to exist. However, a color master was discovered recently at the library at Georgia State University.
During Al Roker's weather report, he references the fictional Alex P. Keaton International Airport. Alex P. Keaton was the name of the character played by 'Michael J. Fox' on Family Ties (1982) which is rerun on Nick At NIte.
The man playing the saxophone during "The Christmas Song" is the show's music director Tom Scott. Scott, a two-time Grammy winner, is best known for the his popular 1970s jazz funk band LA Express. He also played with the original Blues Brothers band with John Belushi and Dan Aykroyd in the late-'70s.
In the pre-credit sequence, Martin Mull tells the staff that they have "a hastily rehearsed production number" to perform. This was actually a true statement. The show's creators had planned to use "We Need A Little Christmas" from the musical Mame as the opening number, but with new lyrics written specifically for the special. However, when the song's composer 'Jerry Herman' rejected the new lyrics, the opening had to be scrapped and restaged using the song's original lyrics. The actors had less than an hour to learn the new number before the show was taped.
During Al Roker's final weather report, the radar shows Santa's course across the United States. He changes course abruptly at Indiana as a tribute to the show's editor Sharon Everitt Polito, who is from that state.
The Clay Aiken/Bing Crosby duet of "Little Drummer Boy/Peace On Earth" was such a hit with fans, they began a grass-roots campaign to get the song released as a single. When this failed to work, they started calling radio stations, many of which filled the demand by playing a version of the song that was dowloaded from the internet.