Casting is always subject to availabilities.

The thing about The Departed, the x-factor that people can't quite put their finger on, is that it deals clearly with class and accent all these things that are fundamental to Boston, but previously anomalous or even prohibited in demotic American films.

I never viewed screen drama as a vulgar form, or a lesser one, and I've never written it left-handed.

I never write with particular actors in mind.

But the web is to some degree a broth of psychopaths seeing what they can get away with in circumstances of anonymity. Look, we live in a world where one is unsafe in various ways because of the Internet. Anything can be said. Someone can look at your house from space.

In Boston terms I was everyone and no one, with no social investment, no social insecurity, sort of Imitation of Christ in one hand and The Education of Henry Adams in the other, and because I was part of nothing I could observe everything without having anything personal invested in the findings.

I'd been working so hard making the film that I hadn't even emotionally processed the fact that I was a director.