Slade and Oliver in “Unfinished Business”

Slade

Where am I?

Oliver

As far away from the world as I could get you. Where you can't hurt anyone ever again.

Slade

That's your weakness, kid. You don't have the guts to kill me.

Oliver

No. I have the strength to let you live.

Slade

Oh, you're a killer. I know, I created you. You've killed plenty.

Oliver

Yes, I have. You helped turn me into a killer when I needed to be one. And I'm alive today because of you. I made it home because of you. And I got to see my family again. But over the past year, I needed to be more... but I faltered. But then I stopped you. Without killing. You helped me become a hero, Slade. Thank you.

Slade

You think I won't get out of here? You think I won't kill who you care for?

Oliver

No, I don't. Because you're in purgatory.

Slade

I keep my promises, kid. I keep my promises! I keep my promises.