I have Lost in Space as well I use: …/TV Shows/Lost in Space/Season 02/Lost in Space – s02e17 – Episode Name.ext as found in Naming and Organizing Your TV Show Files | Plex Support
If you are set up this way, have the local file info agent at the bottom of the agents in settings, I’d recommend you check the standardization of all your shows files and folders and do the plex dance (The Plex Dance ™) to clean up the metadata. This should get you going
