Okay, I'm listening to Halloween Music on the Sounds of the Seasons Music Choice channel on Comcast/xfinity, and just a minute ago, they played something they called "The Witch Casts a Spell", which they apparently didn't know where it came from, because they simply credited it as being by "Various Artists", and said it was stock sound effects and such, but anyway, the "song" was basically a witch reciting a bewitching, Halloween version of "Twas the Night Before Christmas" about casting a spell... at one point, she addresses herself as Prunella, and she even sounded just like her if she added a sinister growl to her voice... there was also a brief moment where you can hear other kids screaming, and even a coherent, "Get away from me! Get away from me!", which sounded very much like D.W., not to mention the other kids screaming did sound like Arthur and his friends screaming.
Did this ever happen on the show, and if so, can it be assumed that it was Halloween-themed episode or something, with Prunella getting carried away dressed as a witch or something?
EDIT: Okay, NOW, they're playing another track called "Witches Brew"... I SWEAR it's the same Prunella. What are these from?