Chuck and Casey in “Chuck Versus the Best Friend”

I can't betray my best friend. How come nobody gets that?

Hmm. Semper Fidelis. Means always faithful in the Marines. In civilian life, means putting your friend's well being above your own. I salute you for that, Bartowski. Well done.

Yeah, that's-- Thanks, Casey. Yeah. Semper Fi. You know it's a pretty upside down world when this guy's the one picking up the emotional nuances around here.