Pilot
MULDER: "Sorry, nobody down here but the FBI's most unwanted."
Syzygy
MULDER/SCULLY: "Sure, Fine, Whatever."
SCULLY: "Mulder, shut up." (Trevor)
MULDER: "I was told once that the best way to regenerate body heat is to crawl naked into a sleeping bag with somebody else who was already naked."
SCULLY: "Maybe if it rains sleeping bags you'll get lucky." (Detour)
(
MULDER: "Dear Diary: Today my heart leapt when Agent Scully suggested spontaneous human combustion." (Trevor)
SCULLY: "Well, it seems to me that the best relationships-- the ones that last-- are frequently the ones that are rooted in friendship. You know, one day you look at the person and you see something more than you did the night before. Like a switch has been flicked somewhere. And the person who was just a friend is... suddenly the only person you can ever imagine yourself with." (Rain King)
MULDER: "The truth will save you Scully. I think it'll save both of us." (Momento Mori)
MULDER: "Hey, Scully." (leans up on his elbow)
(SCULLY comes back and leans close to his face.)
SCULLY: "Yes?"
(Long pause.)
MULDER: "I love you." (Triangle)
DEEP THROAT: "A military UFO? Mr. Mulder, why are those like yourself, who believe in the existence of extraterrestrial life on this earth, not dissuaded by all the evidence to the contrary?"
MULDER: "Because, all the evidence to the contrary is not entirely dissuasive."
DEEP THROAT: "Precisely." (Deep Throat)
SCULLY: "Oh, God, Mulder. It smells like... I think it's bile."
MULDER: "Is there any way I can get it off my fingers quickly without betraying my cool exterior?"
MULDER: "How can I disprove lies that are stamped with an official seal?"
FBI OFFICIAL: "That will be all, Mr. Mulder."
MULDER: "You can deny all the things I've seen, all the things I've discovered, but not for much longer. Because too many others know what's happening out there. And no one, no government agency, has jurisdiction over the truth." (Fallen Angel)
MULDER: "Scully..."
SCULLY: "Yes?"
MULDER: "Marry me." (Chinga)
SCULLY: "Mulder, speaking of cleaning up, whoever taught you how to squeeze a tube of toothpaste?" (Arcadia)