Ava DuVernay brings a story of the deep impact of police violence on Black communities to primetime television with “The Red Line.” The series’ eight episodes chronicle the fallout of a shooting on the lives of three connected people: the deceased’s partner (Noah Wyle, “The Librarians”), the officer (Noel Fisher, “Shameless”) and a political candidate Emayatzy Corinealdi, “Middle of Nowhere”) who hears from the daughter (Aliyah Royale, “War Paint”) she gave up for adoption—to the shooting victim. Learn how these threads weave and unravel when “The Red Line” premieres on April 28.