X-Files was a great series. Everyone here's correct there were times it got really odd, quirky weird, but during the span of the series it kept true to what it was, and the overplot that carried to the series finale to the theatre.
It's similar to SG-1 in the fact that there were times it wasn't afraid to make light of its genre, if not make outright fun of itself. The episode Jose Chung's From Outer Space was among the quirkiest with a lot of curious references.
This is a series I catch most nights as it replays on at least two channels where I'm at. Along with older stuff like the Twilight Zone, it remains part of my inspiration in gaming and writing. Definitely up for seeing this one.