Watch the long-awaited trailer for the latest Martin Scorsese project, “Killers of the Flower Moon,” based on David Grann’s broadly lauded best-selling book. Killers of the Flower Moon is set in 1920s Oklahoma and depicts the serial murder of members of the oil-wealthy Osage Nation, a string of brutal crimes that came to be known as the Reign of Terror. It will arrive in theaters on October 6, 2023, just in time for awards season.