The X-Files Season 3 Episode 15

Scully: You know, it's strange. Men can blow up buildings, and they can be nowhere near the crime scene. But we can piece together the evidence and convict them beyond a doubt. Our labs here can recreate out of the most microscopic details their motivation and circumstance to almost any murder. Right down to a killer's attitude towards his mother and that he was a bedwetter. But in the case of a woman... my sister... who was gunned down in cold blood in a well-lit apartment building by a shooter who left the weapon at the crime scene, we can't even put together enough to keep anybody interested.
Skinner: I don' think this had anything to do with interest.
Scully: If I may say so, sir. It has everything to do with interest. Just not yours and not mine.

(Mulder & Scully discussing the details of a new case that Mulder believes may have something to do with the remains of a UFO)
Mulder: I checked. It's thousands of miles away from any test sites. (Scully smiles, then laughs) What?
Scully: I'm just constantly amazed by you. You're working down here in the basement, sifting through files and transmissions that any other agent would just throw away in the garbage.
Mulder: Well that's why I'm in the basement Scully.
Scully: You're in the basement because they're afraid of you, of your relentlessness and because they know that they could drop you in the middle of the desert, and tell you the truth is out there, and you would ask them for a shovel.
Mulder: Is that what you think of me?
Scully: Well, maybe not a shovel. Maybe a backhoe.
Mulder: Well that's good because there's some garbage in San Diego I want you to help me dig through.

[Mulder, Scully and Morgan looking at something underwater through a videotape]
Morgan: What the hell is that?
Mulder: Looks like the fuselage of a plane.
Scully: It's a North American P-51 Mustang.
Morgan: Yeah it sure is.
Mulder: I just got very turned on.