https://www.looper.com/743172/why-some-x-files-fans-gave-up-on-season-9
https://en.wikipedia.org/wiki/Mythology_of_The_X-Files#Season_9
The Mythology_of_The_X-Files allowed for several episodes with various themes.
https://www.slashfilm.com/740708/the-independence-day-easter-egg-in-the-x-files-movie-explained
https://www.unexplained-mysteries.com/news/177162/britains-big-cat-x-files-revealed There have been several cases of animals seen where they shouldn't belong. Animals out of their natural habitat or even from another epoch of time. Of course some might simply have been released or escaped. While others that are usually hidden in forests or jungles or deep in the ocean, might occasionally intersect with people.
https://x-files.fandom.com/wiki/Main_Page
https://www.unexplained-mysteries.com/news/177162/britains-big-cat-x-files-revealed
https://desertshapes.blogspot.com/search?q=The+X-Files