Don’t mess with COS.
The monster is a machine this time, or so it seems. Very interesting.
Points of note: “Deep Throat” is called upon twice, Mulder/Scully make a major enemy.
Scully’s affection for Mulder becomes obvious here, at least in a legitimately maternal way.
http://en.wiktionary.org/wiki/motherly
Amusing little ‘2001’ reference, too.