Not detecting TV media

Plex DocumentationYour MediaNaming & Organizing TV Shows

Adventure Time, correct?

Make sure you use Plex recommended naming and structure.

Plex Dance the show if you have to rename/reorganize.

/TV Shows  <-- folder added to TV Show library.  Name does not matter
.../Adventure Time (2010) {tvdb-152831} <-- Show_Name (year), TVDB/TMDB ID optional.
....../Season 01  <-- "Season" in English.  Two digits for number
........./Adventure Time (2010) s01e01.ext <-- sXXeYY mandatory.  ext = mkv/mp4/etc