Doggett: [about Scully and Mulder] Are they flirting?
Reyes: I think so.
Scully: We are not flirting, we are arguing.
Mulder: We are flirting.
Scully: So, what's the charge this time?
Mulder: Striking a superior asshole.
Scully: And I bet you've been waiting all day to say that one.
Mulder: Most of the afternoon, yeah.
[Having failed to help Skinner write his vows, Mulder and Scully go to the church for their own updated vows]
Mulder: I vow to keep at least 80% of these vows.
Scully: That seems high.
Mulder: And I vow to keep them updated as we go, because one set of vows can't cover a lifetime of growing and changing with you, of raising children with you. Falling more and more in love with you everyday, Dana Scully, which is what I vow to do for the rest of my life.
Scully: [tears] Crap, I already broke my crying vow.
Mulder: I'll forgive you. [kisses Scully]