This one is the coolest, Fred's mother-in-law Pearl Slaghoople as a witch. Perfect casting, as Fred and his dear ol' mother-in-law never got along too well.
Fred's boss Mr. Slate as some kind of guard.
And here's the Great Gazoo playing the role of the Sorcerer. He's even gone so far as the borrow Mickey Mouse's hat from Fantasia. It's nice they included some of these supporting players from the original series, but what's the deal with Fred being drawn a bit off-model in this last picture!?