Guide to getting Plex to properly recognize and sort Star Trek shows

Plex Media Server Metadata & Adding Files
6
  1. take the series out of that subfolder
  2. remove them from the /Serien folder temporarily
  3. only add Serien as a source to your Plex tv show library
  4. “Scan Library Files”

Inspect the properties of your tv show libraries.
On the “Advanced” tab, what appears as “Agent”?
If it is “Plex TV Series”, continue with step 4 below
If it is anything different, perform the Plex Dance from step 3) on.

  1. re-add the series one series at a time into the main Serien folder.
  2. “Scan Library Files”

Repeat steps 4 and 5 until all series have been added.

If your Agent setting is “Plex TV Series”, you can improve Plex’s matching further, by adding the show ID numbers of TheMovieDB.org or TheTVDB.com to your folder names, as described in here: Naming and Organizing Your TV Show Files | Plex Support