Jellyfin Missing Episodes: First Release

I shipped the first version of my Jellyfin Missing Episodes plugin. The problem it solves is simple: you have a TV library, and you have no easy way to know which episodes you are missing without clicking through every show manually.

The plugin adds two things to your Jellyfin dashboard. First, a widget that shows a total count of missing episodes across your entire library. Second, a full report page where you can search and filter by show to see exactly what is absent.

One thing I wanted to get right from the start: no external API calls. The plugin works entirely from the metadata Jellyfin already has. It knows what seasons and episodes exist for each show in your library, so it can figure out the gaps itself without phoning home to TVDB or anywhere else. That keeps it fast and offline-friendly.

This is version one, so it is deliberately simple. The report is a bit rough around the edges and there are some edge cases I have not handled yet, particularly around shows with unusual season numbering. But the core feature works, and I have been using it myself for a couple of weeks before publishing.

The plugin is available through the Jellyfin plugin catalogue. If you have a large TV library, it is the fastest way to find what you are missing.