THE best: "Jose Chung's 'From Outer Space' ".
Fantastic dialogue:
Blaine: [about Scully and Mulder] One of them was disguised as a woman, but wasn't pulling it off. Like, her hair was red, but it was a little too red, y'know? And the other one, the tall, lanky one, his face was so blank and expressionless. He didn't even seem human. I think he was a mandroid.
Jose Chung: Aren't you nervous telling me all this? After receiving all those death threats?
Blaine: Well, hey, I didn't spend all those years playing Dungeons and Dragons and not learn a little something about courage.
Jose Chung: Seeking the truth about aliens means a perfunctory 9 to 5 job to some - for although Agent Diana Leski [Scully reading the final book "From Outer Space"] . . . is noble of spirit and pure of heart - she remains nevertheless - a Federal employee. As for her partner - Ranerdt Muldradt - 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.
If you watch that scene close enough, as Charles Nelson Reilly (Jose Chung) is doing the voiceover questioning Mulder's sanity and source of pleasure, Mulder appears to be masturbating to the Roger Patterson bigfoot video.