Having to rename TV shows so Plex will read them was a pain ..I recently came across a little program..

"FileBot is the ultimate tool for organizing and renaming your movies, tv shows or anime, and music well as downloading subtitles and artwork. It's smart and just works."

Works a treat.

I will refrain from posting the link cause Im not sure on the rules for link-backs here. Just search FileBot.

Regards.