Sir Mouse Christmas Special: Brother (1970)

This year, King will celebrate Christmas with the most hospitable of his subjects, whoever that might be. Mouse hopes King will choose her, so she starts to make the cave as cosy as possible, but that just causes a disagreement with the overprotective Dragon. The pair even fight at the Christmas market, and go their separate ways. Mouse hangs out with the foul-mouthed Brother, while an unfortunate spell renders Dragon invisible and inaudible. Which makes a reconciliation difficult, of course.