Well, here is a little humorous warning for you.
Be sure to watch for what Mulder is watching on the TV (no, it is not porno).
This is the ending clip from the 1996 X-Files episode, "Jose Chung's 'From Outer Space'."
"As for her partner, Raymond Muldrake, a ticking time bomb of insanity, his quest into the unknown has so warped his psyche one shudders to think how he receives any pleasures from life."
And here is a shorter version, centering on the Bigfoot part:
Read about the episode on Wikipedia: