Casey and Sarah in “Chuck Versus the American Hero”

I just came by to tell you something about Bartowski.

Well if you're come to plead his case, then it's really not necessary.

He didn't send me. He doesn't know I'm here. I just wanted to tell you something in case it changes anything. He didn't kill the mole.

What?

I did. He didn't have the stones to pull the trigger. Kid's not a killer. He's just not wired that way; unlike us. Just thought you should know.