The interviewer, Chris Tinkham, asks Curran about the radio show the DeNiro character is listening to throughout the film:
Throughout the film there’s radio commentary. Was that part of the original screenplay?
No, that wasn’t even indicated in the screenplay. That was an idea that was borne out of desire to kind of place it in a time, give it some sense of a news aspect but not go heavy on it. But more to the point was to keep a faith-based discussion going throughout that I didn’t have to put into Bob’s mouth, into the character’s mouth. I didn’t want the characters overly discussing these notions of God and redemption and faith, and I felt it as as an almost soundtrack to his character. I started putting music in there for when he’s listening to the radio or whatever, and it just didn’t work, [he] didn’t seem to me like the kind of guy who would listen to music unless it was going to be ’40s swing or something, which is kind of lame and dumb, typical for some reason. Once I hit on that, I started listening to local guys, and that’s a local Detroit radio host.
So were those archival tapes?
Oh yeah, a lot of it is. It’s Paul Edwards. He’s got a radio show called God and Culture. Some of it’s archival, some of it he recorded with actors in a studio. He kind of did like a show that we recorded. They were free to talk about whatever they wanted to talk about, and I just grabbed stuff.