Oppenheimer has become a bonafide hit, earning the best box office performance yet for a Christopher Nolan-helmed film. The three-hour epic brings to life the true story of J. Robert Oppenheimer (Cillian Murphy) and those who were in his orbit during and after the creation of the atomic bomb — and apparently, one of the darkest scenes was expanded upon while filming. In a recent profile with The New York Times, Nolan revealed that the line from Henry Stimson (James Remar) about choosing not to bomb the part of Japan that he honeymooned in was added at the last minute. This came after Remar himself researched the intricacies of Stimson's life, a bit of homework that many of Oppenheimer's ensemble cast members did with their characters.