Naming of TV Shows

As mentioned in Naming and Organizing Your TV Show Files:

Note : Multi-episode files will show up individually in Plex apps when viewing your library, but playing any of the represented episodes will play the full file. If you want episodes to behave truly independently, you’re best off using a tool to split the file into individual episodes.

The best approach is to split the file into individual episodes. Most multi-episode files have chapter markers denoting the start of each episode. That makes it easy to determine the split points for the file.