Just thought I'd chime in as well, thanks for the playlist idea! I also only associated playlists with music. I don't have as many seasons of TV shows, only 10 or 15, but this will be a big help. I have been going through the painful process of manually setting media subtype to separate my TV shows from movies, as well as setting the genre, and adding a second title that includes the season/episode numbers. Changing the existing title changes it for every show in that series, but if you add a second title that second one is the one that shows up when broswing media. Even so, shows with long names such as Battlestar Galactica have the name cut off so when browsing it only shows up as Battlestar so the episode gets cut off. I've added the episode number on a few as a test, but I'm not seeing the episode number anywhere while browsing.
I'm not sure what a good solution to the episode problem would be, but using playlists should get around that issue.