Black Lightning Season 3 Finale Trailer (HD) – Black Lightning (Cress Williams) faces off against Gravedigger (guest star Wayne Brady “Whose Line Is It Anyway?”). Christine Adams, Nafessa Williams, China Anne McClain, James Remar, Damon Gupton, Marvin Jones III and Jordan Calloway also star. Salim Akil directed the episode written by Charles D. Holland (#316). Original airdate 3/9/2020.