This is the one, the episode my family and I remember so well, one of those defining episodes that we couldn't stop thinking about, keeping us awake as we try to sleep. It really comes down to this guy Tooms and those eyes, those glowing eyes of his that really rank high with the scariest memories of fictional characters I've ever watched. The ability to squeeze his way into any place with ease is another frightening thought, a darkness that you can't keep locked out. What's fantastic about this episode isn't just in the music, or the character or the suspense but the dialogue too. The ending scene where Fox is explaining how all the money in the world can't keep some threats locked away is scary because its true, it reminds me of the Halloween movies where Donald Pleasence talks about Michael Myers as being the embodiment of pure evil. You can never really destroy it, its everywhere, its in us. As Fox is speaking Tooms looks at a small crack in the door... and we know he'll be out again just like Mulder saying right at that very moment.
One of the classic episodes of the series, and only the third one. There's so much more to go through.