Smallville, Season 2

Clark:
You grow up with someone, you think you know them, but... I mean, darkness like that just doesn't come out of nowhere... I'm sorry about your company. What's gonna happen next?

Lex:
My father thinks I'll go back to work for him.

Clark:
Will you?

Lex:
It's hard to imagine working for a man who can enrage four people to the point where any one of them had motive to kill him.

Clark:
Even you.

Lex:
You know that darkness you were talking about? I'm not sure we're born with it. I think people like my father find a way to bring it out.