Black Lightning "The Book of Ruin: Chapter Two" Photos Released ✖ The CW has released two new images for "The Book of Ruin: Chapter Two", the sixth episode of Black Lightning's fourth and final season. The two images, both of which feature Jefferson Pierce (Cress Williams) suited up as Black Lightning, don't reveal a lot about the episode, but given the major events of this week's "The Book of Ruin: Chapter One: Picking Up the Pieces" fans can expect it will likely be an emotional one as that episode saw the Pierce family dealing with Jennifer's after a devastating experience with the energy of the ionosphere.