Breaking Bad, Season 1

Krazy-8:
Walter, you getting to know me is not gonna make it any easier for you to kill me. Not that I mind, you understand.

Walter White:
You know, you keep telling me that I don't have it in me. Well, maybe, maybe not. I sure as hell am looking for any reason not to. I mean, any good reason at all. Sell me. Tell me what it is.

Krazy-8:
I guess I'd start off by promising that if you let me go, I won't come after you. That you'd be safe. I guess I'd say what happened between us never happened. And what's best for both parties is we forget all about it. But you know that anybody in my situation would make promises like that, and though in my case they happen to be true, you'd never know for sure. So what else can I tell you?

Walter:
I don't know. But you gotta convince me and you're going nowhere until you do.