Smallville, Season 5

Lionel:
I've been expecting you, Kal-El.

Clark:
How long have you known?

Lionel:
From the moment I held in my hand the crystal that helped to create your Fortress of Solitude.

Clark:
The one that put you in a coma.

Lionel:
Coma? I like to think of it as... a state of contemplative repose.

Clark:
You've known my secret for almost a year.

Lionel:
Yes.

Clark:
Why haven't you done anything?

Lionel:
What? Expose you to the world? A strange visitor from another planet? I've tried to tell you--I am not your enemy. To reveal your secret would change your destiny. And it would harm someone I care about very deeply.

Clark:
You had a choice: To kill my mother or to kill yourself.

Lionel:
I could never harm your mother. There was no choice.

Clark:
Yeah. [pause] Unless you knew the gun wasn't loaded.

Lionel:
You have no reason to believe anything I say. I realize that. I hope eventually you will come to trust me. I only want what's best for you and your mother, son.

Clark:
[angrily] You don't call me that. Jonathan Kent was my father.

Lionel:
No. I'm not trying to take his place.

Clark:
You couldn't. My mother seems to think there may be some good in you, but I'm not so sure.

Lionel:
It takes time, Clark. Maybe you will be.

Clark:
Or maybe you'll just show your true colors. Secret or no secret, you stay away from my mother, or you'll wish I'd never saved your life.