I used to live in New York and now I live in L.A., and somehow I've become a different person because of the air and what I see every day, and I think we all do.

Because we spent so much time in the writer's room, not even talking about where it goes, but just who the people are in our world, we could find all those unexpected moments and twists and turns that we didn't even see ourselves.

And as cynical and jaded as many have become, you see the heroic nature of cops, who put aside a lot of their own personal concerns and their families to speak for the dead, which is a sacred thing. Over time there is this thing in them that is very powerful and interesting and provocative to me.

I am endlessly fascinated by this notion that everyone has a secret. Some of our secrets are tiny, small things, and some of them are huge. Given that reality of the human condition, that's what our characters will go through. There will be some things where you'll just be like, "What the hell! How the hell did that happen?"

I think it is the hardest thing in the world. I'm endlessly intrigued by what human nature is capable of, both the horrible things we are capable of and also the heroic things. I'm really interested in exploring that side of human nature.

Creating a world that reflects the inner voyage of our characters was really important. Also, because this isn't a black and white show, and this isn't about bad guys and good guys, but it's about good men being capable of bad things and vice versa, I wanted to be in a city that had contradiction.

The most surprising thing to me is what an incredibly intense effort it's been to create a world from the ground up. I had run a show that had already existed and had been created by the show-runner, Meredith [Stiehm]. It's a very different experience to come in at ground zero and meet people and assemble the cast and crew. As a group and as a family, we're creating this world.