Black Lightning 3x12 "The Book of Markovia: Chapter Three" Season 3 Episode 12 Promo Trailer HD - DEMONS - Jefferson (Cress Williams) and Anissa (Nafessa Williams) join forces with the ASA to help one of their own. Meanwhile, Lynn (Christine Adams) is forced to continue battling her demons. China Anne McClain, James Remar, Damon Gupton, Marvin Jones III and Jordan Calloway also star. Bille Woodruff directed the episode written by Adam Giaudrone & Lynelle White (#312). Original airdate 232020.