<P> In January 2014, rumors arose that Donal Logue would portray Gordon in the series . Logue denied these rumors via Twitter . Logue was eventually cast as Harvey Bullock . </P> <P> In February 2014, Ben McKenzie was cast as James Gordon . McKenzie had shot a previous pilot with Heller for CBS, which led to Heller writing his characterization of Gordon with McKenzie in mind . Casting Bruce Wayne was challenging in part because, as Heller put it "It's such an important casting and it would've been very dangerous to cast the wrong person" adding that the casting process for Wayne "took a lot of negotiation, a lot of back and forth so that everyone was happy and comfortable ." In early March 2014, David Mazouz was cast as Bruce Wayne while Camren Bicondova was cast as Selina Kyle . At the 2014 Chicago Comic & Entertainment Expo, DC's Jim Cunningham said that Renee Montoya would be a character on the show . </P> <P> In February 2014, it was reported that production would begin in New York City in March . Filming for the first season finished on March 24, 2015 . </P> <P> In July 2014, it was announced that Graeme Revell would be the composer for the series . </P>

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