TV Shows edit Metadata...?

I have a TV Show in a Folder on my Server…

If I Open this Folder with the AppleTV-App, I See only the files with false Metadata and it not Show up as a TV Show!!!

How can I set the Folder as TV Show?

And how I can edit the Metadata?
Because the files are interpreted with false Metadata and I cannot search for this TV Show, because its a German TV Serie and this is not in the Metadata Library!!!