“John Langston was running through a neighborhood in ruins. Burned homes and businesses were still smoking, their windows shattered. Langston was only 12 years old, but he was determined to save his brothers’ lives. He had spent the night in a safe house, sheltering from the white mobs that had

““You know how you can tell the difference between a masked cop and a vigilante?” “No.” “Me neither.” This exchange between Laurie Blake, former costumed vigilante turned FBI agent, and Angela Abar, masked Tulsa police detective, lays out a conundrum at the heart of HBO’s 20