Episodio 1: "The Return"
"Damon: So what's it going to be, huh? Fight to the death?
"Stefan: I'm not going to fight you."Damon: Why?! I'd fight me.
"Elena (to Damon): I love Stefan. It will always be Stefan.
"Damon: Just doing my part in the neighborhood watch.
"Katherine: Kiss me or kill me. We both know you're only capable of one.
"Stefan [to Damon]: She'll try to break us, and how we respond to that will define us.
"Katherine: I came back for you.
"Stefan: The problem, Katherine, is that I hate you.
"Katherine: That sounds like the beginning of a love story. Not the end of one.
"Stefan: I haven't spent 145 years obsessed with you.
"Katherine: Based on your choice of women, I'd say otherwise.
"Damon: You think Katherine is gonna send me off the deep end, don't you? I don't need her for that.
"Stefan: How can I play if I don't know the rules?
"Katherine: No rules, Stefan. Don't you remember? No rules.
"Bonnie: When we're alone, I'm gonna take you out.
"Damon: You need to stop with the witch's brew. You're starting to believe your own press.
"Mason: In my mind, you're 12 years old.
"Tyler: That's two years older than the last time you saw me.
"Elena: What happened?
"Jeremy: I don't need a babysitter.
"Damon: Katherine happened.
"Elena: Yes, you do.
"Damon: She's Katherine. She loves to play games.
"Elena [to Stefan]: He kissed Katherine, not me. I wouldn't do that.
"Damon: Katherine wants you dead, there's zero you can do about it. You will be dead.