Clark and Lex - season 6
"Were we ever really friends, Lex?"
"I don’t know. I have nothing to compare it to. You’re the only real friend I’ve ever had, Clark. And somewhere along the way, you saw me as your nemesis, turned your back on me."
Clark and Lex - season 5
"I’m the one that’s gonna kill you, Clark."
Clark and Lex - season 3
"This friendship’s over."
Clark and Lex - season 2
"Clark Kent and Lex Luthor. I like the sound of that."
Clark and Lex - season 1
"Trust me, Clark. Our friendship is going to be the stuff of legend."
favorite Lex Luthor-centric episode, asked by ohmeitschelly