Breaking Bad, Season 4

Walter:
A month ago, Gus was trying to kill both of us, and now he pulls you out of the lab and employs you as...what? An assistant gunman? A tough guy? Does that make any sense to you? He says he sees something in you. What kind of game is he playing? Does he think you're that naive? He can't truly think that you'd forget. Let alone Gale, let alone Victor, and all the horror that goes along with all of that, what about this girlfriend of yours? And her little brother? I mean, the man looked you straight in the eye and told you no more children, but that very night, that little boy...he just, he winds up...I mean, Gus can't possibly think that you'd forget that. All I'm saying is that is it possible that he would think that you're that weak-willed...

Jesse:
Drop the sales pitch. I'll do it.

Walter:
You'll do what?

Jesse:
I'll kill him. First chance I get.