Lex and Clark in “Unfinished Business”

Lex

I told you to let it go, but you kept pursuing it. You even involved my father.

Clark

Yeah, well, believe me, Lex. He's the last person I'd ask for help, but I didn't have any other options.

Lex

He betrayed you, Clark. He stopped my sessions with Garner by offering you up as a lab rat. I've tried to keep my father away from you, but he's obsessed. If I'd got back those seven weeks, I could've finally stopped him.

Clark

Maybe, Lex. Or maybe you'd make it worse. You're always telling me how you don't want to turn into your father, and I truly believe that. But the more you two go at each other, the more like him you become. And the more people get hurt.

Lex

I will never become my father. I would never sacrifice you or anybody I cared about to bring him down.

Clark

Lex.... why does your father hate you so much?