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?"

It's the open ocean right now because it's so unique. It's a really unique way of doing American television. There are a million possibilities. We can stay with the cops. We can introduce new worlds. And, who knows where it will end.

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.

Before I write anything, before I create any assumption in my mind about what it's like to be in that world, I go out there first. I'm very drawn to darkness and light, very drawn to cop drama, because there are very few places besides war and murder and a homicide investigation where you see the extremes of human nature - the darkest crevices and cracks in what people do to one another.

Seattle is beautiful. You look at the sky and it's one of the most beautiful skies in the world, and then there's the Puget Sound, which will kill you, if you fall into it, but it's also beautiful. Seattle is a city of contradictions. It's the most liberal and most literate city in America, and it has Starbucks and [Bill] Gates, but it's also where the Green River killer hunted women and where the runaway population is just shocking when you walk the streets. Within the same city, there's darkness and light.

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.