I always tell Lawrence Gilliard Jr. he never got a decent bite of the apple, so I was happy we had a role that seemed perfect for him. I like the idea of him as one of the few moral centres of the Wire show.

The murder clearance rate now in my city Baltimore is almost non-existent. Nobody can solve a murder, nobody can do any actual police work, because they've learned how to do bad police work, chase drugs. Fighting vice, while being unable to respond to sin. Generations of cops have learned how not to police work by policing the drug war. Not only are they police brutal, they're ineffective. Baltimore is more violent than it has ever been in modern history.

What city has given the world more in terms of American culture than New Orleans? There is none. Not New York. Not L.A. Not Chicago. Not anywhere, in the sense that African American music has gone around the world twenty times over, and it's continuing to evolve. It is our greatest cultural export.

Lawrence Gilliard Jr. is a fine actor and I've always felt some residual guilt that we killed him so early in The Wire. It was always planned that way; we didn't kill him because of anything he did, we don't kill off actors just to do it.

You can't make a good show based on pure verisimilitude, pure anti-drama. But you have to acknowledge a lot of ordinary life. Most TV doesn't do that.

In Baltimore they can't do police work to save their lives. Now because of Freddie Gray they're not even getting out of the car and policing corners - they're on a job slowdown, basically. Right now if the police stopped being brutal, if we got police shooting under control, and the use of excessive force, if we have a meaningful societal response to all that stuff, and the racism that underlies it, the question still remains: what are they policing, and why?

Not only did this new pornography industry change the way men look at women and how we relate to sex, how we sell stuff, and not only did it change America's cultural landscape - it's also this incredible metaphor for a market-based economy. The great pyramid scheme that America has become. I felt like in were larger themes in terms of culture and economics that could be addressed.