After months of building anticipation, writer-director Christopher Nolan’s new movie Oppenheimer arrived in theaters Friday, kickstarting an opening weekend where it’s expected to collect around $50 million at the domestic box office. The three-hour (and nine second) biopic centers, as its title suggests, on J. Robert Oppenheimer (played by Cillian Murphy), the theoretical physicist widely known as the “father of the atomic bomb” who infamously summed up his life’s work in a 1965 NBC News documentary by reciting a line from the sacred Hindu text the Bhagavad Gita: “Now I am become death, the destroyer of worlds.” [time-brightcove not-tgx=”true”] Oppenheimer: Corbis/Getty Images; Murphy: Courtesy Universal PicturesJ.