[Katherine] I've been thinking about your diabolical plan.
[Stefan] Oh, do tell.
[Katherine] Well you must know that Klaus is too paranoid to ever fully trust you. But the sister, she loves you like it was yesterday. She's the easier mark. But you can't just pretend to care because Klaus will know better. So you do the opposite: you bond with him, make her feel left out. That'll only make her want you more.
[Stefan] Oh, so you mean, I'm uh, I'm taking a page out of the Katherine Pierce play book.
[Katherine] The only question is why, Stefan. I mean, I get it. You want to keep Klaus away from Mystic Falls, but what else do you expect to get from it?
[Stefan] You know what's funny? You keep talking to me like I actually trust you enough to tell you anything.
[Katherine] Oh, c'mon Stefan.. we're beyond that. I saved you from Hilda the High Voodoo Priestess.
[Stefan] Okay. I knew them.. back in the 20's. They were running from someone. Someone who scared them.
[Katherine] A hunter. I heard stories about him centuries ago.
[Stefan] Don't you want to know why an Original vampire who can't be killed is afraid of a vampire hunter?
[Katherine] If you're planning on making a move against Klaus, I want in.
[Stefan] It's good. It's good to want things, Katherine.
[Katherine] Stefan.
[Stefan] Katherine, I'm in this alone. If you're looking for a diabolical partner in crime, I suggest you look elsewhere.