Last time Arthur was voiced by Michael Yarmush.
It is revealed Muffy has a brother named Chip Crosswire. His name is seen on a Christmas stocking on the fireplace in her house.
This special is the show's first Christmas-themed installment.
This special marks the final appearance of D.W.'s favorite song, "Crazy Bus" by Joe Fallon, the show's original head writer. Because Fallon had left the show in 1998 (after Season 4), the show officially retired the song, ending the running gag that began in Season 2, of Arthur getting annoyed over D.W. constantly playing the song.
When Arthur and his mom are Christmas shopping at the mall, a coffee shop called "Stardoes" is seen. This is a parody of the popular real-life coffee shop "Starbucks" and it's also a play on words: a buck is a term for a male deer and a doe is a female deer.