Chuck, Season 3

Chuck:
What does all this mean? Casey. I mean technically I failed my test.

Casey:
You need to understand that for Walker, Shaw and Beckmann, you passed the test. To them, you killed Perry, doing exactly what you were trained to do.

Chuck:
Yeah except that I didn't do it. You did.

Casey:
Chuck, I'm a civilian. Which means technically under the law what happened tonight was a murder. No one can know the truth about that ever. Not even Sarah. She would be implicated too.

Chuck:
But, all that means I'm not a real spy. I don't know who I am; don't know what I am.

Casey:
I can't answer that one for you Chuck.

Chuck:
Hey...Why did you do it?

Casey:
Because you weren't going to. You're not a killer Chuck.

Chuck:
Thanks.