Brennan: Marianne Epps is a clearly bad mother.
Booth: (scoffs) Yeah, well you think?!
Brennan: But, a lot of people have bad mothers and they don't grow up to be serial killers, which is why I don't put much stock in psychology.
Booth: All right listen Bones, I don't care how you explain it, all right, the guy, he's an animal, he's got no conscience.
Brennan: I don't know how one draws moral distinctions between killers?
Booth: Listen Bones all right? There are crimes of passion, all right, crimes committed out of desperation, which are usually followed by remorse or acknowledgement of human failing, the key word here is human.
Brennan: The reasons for killing someone are unimportant, the life that's taken is all that matters.
Booth: Listen, you can't blame yourself here.
Brennan: Yeah, it's me he's after, Angela and everyone else, they shouldn't be involved.
Booth: Look, it's not your fault all right, it's all Epps, which is why I'm gonna take this little bastard down.
(Brennan looks in the side mirror and realizes that there is a car following them.)
Brennan: Booth – (more urgently) Booth – we're being followed.
Booth: Um-hmm, that's right, (chuckles) two agents all the time at a very discreet distance, see, and I don't care how big your gun is all right?