Justice League Unlimited, Season 2

Superman:
A lot of things are starting to make sense now, Professor Hamilton. When did Cadmus recruit you?

Professor Emil Hamilton:
Recruit me? I went to them.

Superman:
How can you work for these people? Do you know what they are?

Professor Emil Hamilton:
Power brokers, politicians, criminals, and black ops mercenaries with one thing in common besides: they're humanity's last hope against your kind.

Superman:
What are you talking about? Humanity doesn't need protection from us.

Professor Emil Hamilton:
I used to believe that. I thought you were a guardian angel, come to answer our prayers. But Lucifer was an angel too, wasn't he?

Superman:
Professor-

Professor Emil Hamilton:
You forget: I've been on the receiving end of your wrath, when you brought Supergirl to S.T.A.R. Labs for medical treatment. I know what you're capable of.

Superman:
That's what this is about? One little scare and you betray us?! You stole Kara's DNA! Violated her trust! My trust!

Professor Emil Hamilton:
The chicken, or the egg, Superman?