Black Lightning 3x15 "The Book of War: Chapter Two" Season 3 Episode 15 Promo trailer HD - THE PIERCE FAMILY PREPARES FOR WAR – After learning that Gravedigger (guest star Wayne Brady) and the Markovians are coming to attack Freeland, the Pierce family prepares for war. Cress Williams, Nafessa Williams, China Anne McClain, Christine Adams, James Remar, Damon Gupton, Marvin Jones III and Jordan Calloway also star. Oz Scott directed the episode written by Pat Charles (#315). Original airdate 3/2/2020.