Netflix is a popular streaming service that offers a wide variety of TV shows and movies for its subscribers. However, it is not uncommon for users to notice that not all seasons of a TV show are available on the platform. There are several reasons why this may be the case:

1. Licensing agreements: Netflix licenses TV shows and movies from production studios and distributors, and these agreements often specify which seasons or episodes are included. In some cases, Netflix may only have the rights to certain seasons of a show, or may not have the rights to all episodes within a season.
2. Production delays: Some TV shows may experience delays in production, which can result in a gap between the release of different seasons. If a new season of a show is not yet available, it will not be included on Netflix until it is released.
3. Region-specific availability: Netflix is available in over 190 countries, and the content that is available on the platform can vary by region. This means that certain seasons or episodes of a show may be available in one region but not in another.
4. Removing content: Netflix periodically removes TV shows and movies from its platform due to expired licensing agreements or low viewership. If a show is removed from Netflix, all of its seasons and episodes will no longer be available.

Overall, there are many factors that can impact the availability of TV show seasons on Netflix. Users can check the Netflix website or app for information on the availability of specific seasons and episodes.