<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> <P> The series premiered on Nine Network in Australia on October 12 . In Canada, it is shown in simulcast on CTV and reran on M3 . In New Zealand, it premiered on TV2 on September 28 . In the United Kingdom, it premiered on Channel 5 on October 13 . The channel also screen the second season but after failing to screen the third season it was announced in August 2017 that the season would premiere exclusively on DVD and BluRay and be on Netflix from September 1 . In Ireland, it premiered on RTÉ2 on 26 January 2015 . </P> <P> The pilot was screened at the Warner Bros. Television and DC Entertainment panel at San Diego Comic - Con International in July 2014 . </P>

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