Mayor Lockwood: Klaus, please, don't hurt him. He's my son. He's all I have.
Klaus: And you're all he has. There's a beautiful symmetry to that, don't you think?
Stefan: Well, Jeremy is the hunter, and he has to keep killing vampires to complete his mark, but we can't quite figure out how to keep him from killing us.
Klaus: Sounds like quite the chore, which is why I feel perfectly justified doing a little charity work.
Loneliness, Stefan. That's why me and you memorialize the dead.
Klaus: I was wondering what time I should pick you up tomorrow?
Caroline: How about a quarter to never?
Klaus: I was promised a date in return for one of my hybrids.
Caroline: Yes, a date like to a movie where we don't have to talk and I can put at least three seats between us.
Caroline: How did I become the bad guy?
Klaus: Let me get you a drink. And I'll tell you all about being the bad guy.
Caroline, you're beautiful. But if you don't stop talking, I will kill you.
Klaus: I was feeling benevolent.
Stefan: You're never benevolent.
Truth be told, I'm as evil as it gets.
Tyler is otherwise occupied, making big decisions about honesty and what not.
Klaus: That's impossible.
Tyler: Is it? Or maybe real love is stronger than fake loyalty.
Klaus: How did you break it?
Tyler: By breaking every bone in my body a hundred times for the girl I love.
You know once you choose a Salvatore, you'll destroy their bond.Klaus [to Elena]