Alternate Character Interpretation: In a meta sense. Father Time is most often depicted as a stereotypical 'wise old man' with a long beard. Here he is a loud and obnoxious, but kind-hearted, blue-skinned man who casts spells with a club. He still has a beard, though.
In "Weeping Willow", an anthropomorthic tree that cries is used to make tissues, and it's tears end up creating a flood that serves as the premise of the episode. While the tree itself doesn't appear until the final minute of the show.