The special is co-hosted by Rex (Johnny Counterfit), an erudite Tyrannosaurus rex, and Herb (Tim Conner), a dimwitted and bespectacledStyracosaurus with a gluttonous appetite. The two appeared in previous Will Vinton videos dating back to 1980 including Dinosaur, but this Christmas special is the first in which they have dialogue and contemporary personalities, vaguely parodying Siskel and Ebert respectively.
Situated in a facsimile of London's Christmas Square, Rex and Herb introduce several stand-alone videos of Christmas carols and holiday standards and discuss the origins of each song relating to different holiday traditions around the world.
At Notre Dame Cathedral, The Paris Bell-Harmonic, a group of anthropomorphic church bells who strike their own heads with chime hammers to achieve their respective notes, performs "Carol of the Bells". The low C bell (the tonic) constantly dawdles, chimes out of tune and loses his mallet, enraging the maestro, Quasimodo, who uses a slingshot on the bell to get the proper tone at the end.
At a black church in the countryside, a soul/jazz hybrid rendition of "Joy to the World" plays out in colorful scenes. (This segment, using stylized, flat animation resembling paintings and stained glass windows, is the only segment not rendered in Vinton's trademark Claymation.)
Throughout the program, Rex futilely attempts to clarify the true pronunciation and meaning of the term "wassail', featured in the Christmas carol "Here We Come A-Wassailing". As the show progresses, Rex is accosted by different groups, all singing parodies of the song.
"Here We Come A-Waffling", by a kennel of dogs selling waffles from a vendor's wagon.
"Here We Come A-Waddling", by a gaggle of straggling geese carrying baskets of goodies.
"Here We Come A-Wallowing", by a herd of slovenly pigs on a John Deere-style field wagon gorging themselves on an abundance of assorted fruits.
Rex is convinced that his own pronunciation is correct, but he is continually questioned by the others, including Herb, when the latter is not busy excessively partaking of the various Christmas treats offered by each group; consulting the dictionary provides no meaningful help. Finally, near the program's end, a large truck loaded with cider-swilling Irish elves arrives in Christmas Square singing the correct version of the carol, validating Rex's theory much to his delight. When asked, one of the townies explains the real meaning of wassailing: going around the neighborhood singing Christmas carols, and getting treats and cordials.
At the end, the entire cast performs "Here We Come A-Wassailing", and then "We Wish You a Merry Christmas" as the end credits roll.
A companion soundtrack album was released by Atlantic Records in 1988 and was originally available on LP, cassette, and compact disc. The album contains six songs not featured on the special, including an alternate version of "Angels We Have Heard On High". The song "O Christmas Tree", as featured in the special, was excluded from the soundtrack.
The special was released on the Hen's Tooth Video DVDWill Vinton's Claymation Christmas Plus Halloween & Easter Celebrations in 2003.
^Crump, William D. (2019). Happy Holidays--Animated!: A Worldwide Encyclopedia of Christmas, Hanukkah, Kwanzaa and New Year's Cartoons on Television and Film. McFarland & Co. p. 72. ISBN978-1476672939.
