I don’t know that I’d say The X-Files ripped off TNG. The time loop is a common plot device and Braga wasn’t the first to write it. It’s very common for authors to individually come to the same ideas when they have to create this volume of “what if” every single year, year after year. Braga says he wanted time without the screwed up timeline plot; that’s not a unique reaction by any stretch of the imagination.

If you’re talking about The X-Files episode “Monday” that was actually inspired by The Twilight Zone.