The version of The Twelve Days of Christmas that plays when Turk is in the On-Call room goes as follows:
Twelve beaten children
Eleven drive-by shootings
Ten frozen homeless
Nine amputations
Eight burn victims
Seven strangled shoppers
Six random knifings
Five suicides
Four beaten wives
Three O.D.'s
Two shattered skulls
And a drunk who drove into a tree
Second time somebody besides J.D. notices the presence of Janitor. He is smacked in the groin by a little girl during the Xmas party.
Title most likely inspired by the Depeche Mode song of the same name, which was released in 1989.
First christmas themed episode.