My Personal (X-Files) Canon
meaning, the stories that might have happened in-between the episodes offscreen, via the wonderful world of fanfiction.
In-between Season 1
Alchemy by tree
Waiting For Agent Right by Kel
Then Seasons 2 and Season 3
In-between Season 4
The Sin-Eater by Jane Mortimer
The French Inhaler by onemillionnine
Then Season 5 and Fight The Future
In-between Season 6
Vespers by penumbra23
Bridge by Maria Nicole
Through Season 7
An Influence of Stars by jetfic
The beginning of Season 8
Five Stages by Livia Balaban
Towards the end of Season 9
Sweet Season by sophia_helix
Post The Truth
What The Thunder Said by firecracker
Then I Want To Believe
Post I Want To Believe
Gardening in Tropical Climates by threeguesses
OR
Replacing Season 5 with Reach and Sokol by khyber could have ended The X-Files on such a high note that people would be saying, "The Most Epic Series Finale Ever!"
You know what they say, the best thing to come out of fandom is fanfic, oh, I'm just saying. And I've only read a handful from the vast amount so it's a great way to pass time. Most of the fics I've read is through this excellent fanfic discussion community, xf_book_club, so kudos to them.