[Tomkun]

It would be useful to be able to tag an individual episode with it's own tags. This would be useful for creating seasonal playlists of Christmas specials for example.

[Ned Scott]

I like the idea. Imagine a library where you could tag individual episodes based on their tropes ( http://tvtropes.org ), allowing one to see a list of all beach episodes.

Here's some more crazy examples (but honestly, I really do like the idea): http://tvtropes.org/pmwiki/pmwiki.php/Main/Episodes