Looks like bad naming.
TV Shows should be named like this:
TV Shows <- the folder linked to your tv-show library
Show Name
Season XX
Show Name - sXXeYY - optional stuff such as episode titles.ext
Show Name - sXXeYY.ext <- without the optional stuff that will be ignored by Plex anyway
Where XX is the season and YY is the episode number. .ext is the respective file extension.
Show names should match how the show is listed on TheTVDb.com – mostly that’s just the names, if the show is a reboot it might need the year in brackets as well.
After correcting names you might need to perform a Plex Dance to make Plex forget it already associated that show.
Examples:
TV Shows <- the folder linked to your tv-show library
Perry Mason (2020) <- as listed on TheTVDb.com!
Season 01
Perry Mason (2020) - s01e01 - Chapter 1.ext
Perry Mason (2020) - s01e02 - Chapter 2.ext
...
Perry Mason (2020) - s01e08 - Chapter 8.ext
Pennyworth
Season 01
Pennyworth - s01e01 - Pilot.ext
Pennyworth - s01e02 - The Landlord's Daughter.ext
...
Pennyworth - s01e10 - Marianne Faithful.ext
Warrior (2019)
Season 01
Warrior (2019) - s01e01 - The Itchy Onion.ext
Warrior (2019) - s01e02 - There's No China in the Bible.ext
...
Warrior (2019) - s01e10 - If You're Going to Bow, Bow Low.ext
Season 02
Warrior (2019) - s02e01 - Learn to Endure, or Hire a Bodyguard.ext
Warrior (2019) - s02e02.ext
...
Warrior (2019) - s02e10.ext
The Mandalorian
Season 01
The Mandalorian - s01e01.ext
The Mandalorian - s01e02.ext
...
The Mandalorian - s01e08.ext
Season 02
The Mandalorian - s02e01.ext
The Mandalorian - s02e02.ext
...
The Mandalorian - s02e08.ext
Star Trek Discovery <- most OS don't like special characters like ":"; drop them for best results!
Season 01
Star Trek Discovery - s01e01.ext
Star Trek Discovery - s01e02.ext
...
Star Trek Discovery - s01e15.ext
...
Season 03
Star Trek Discovery - s03e01.ext
Star Trek Discovery - s03e02.ext
...
Star Trek Discovery - s03e13.ext
Side notes
- You can see the shows didn’t properly match based on the names showing in Plex (e.g.
Warrior 2019 ...vs.Warrior 2020...), with each of them consisting of a single season… in particular with some not showing a release date (when sorted by release date) - The orange number badges on each poster indicate the number of unwatched episodes – not the total number of episodes
