Black Lightning was renewed for a fourth and final season by The CW on January 7, 2020. On May 14, 2020, The CW announced that the season wouldn't premiere until January 2021 due to the COVID-19 pandemic. On October 29, 2020, it was announced that the season would premiere on February 8, 2021. On November 20, 2020, it was announced that this would be the final season.
Jefferson Pierce is a man with many faces. He is a former Olympic athlete, respected educator and a father of two. He is also Black Lightning, superpowered protector of the fictional city of Freeland with the ability to sense and harness electricity. Jefferson is not the only one with powers and multiple faces. His oldest daughter, Anissa Pierce, is a medical student, health clinic volunteer and dedicated social activist. She is also the superhero known as Thunder who possesses the ability to drastically increase her density, giving her invulnerability and super strength for as long as she can hold her breath. Finally, Jefferson’s youngest daughter, Jennifer Pierce, is a fiery teen who inherited her father’s athletic gifts but not his desire to be an athlete. Jennifer also inherited superpowers. Her body generates pure electrical energy and she possesses the potential to be more powerful than Anissa or Jefferson and is known as Lightning. Lynn Stewart is Jefferson’s ex-wife but they are still very much in love in addition to sharing the load as co-parents. She’s also an expert in metahuman medicine. Together, the Pierce family faces the challenges of a declined urban community, including a war between a menacing gang that calls itself The 100, and a criminal cartel backed by the Pierce family’s nemesis, the infamous gangster, Tobias Whale. Fortunately, the family has allies in their fight, Jefferson’s surrogate father and a former covert superspy, Peter Gambi.[src]
Jefferson Pierce is still mourning the death of his long-time friend Detective Henderson. Meanwhile, Gambi is presented with an interesting opportunity. Lastly, Lynn and Jefferson are still not able to see eye to eye.
Khalil Payne is a young man ridden with the guilt of his troubled past from his former life in Freeland City, where, as a super-enhanced killing machine known as Painkiller, he was both a member of Tobias Whale's gang and a weapon of Agent Odell and the shadowy ASA. After attempting to bury the darker, devastatingly lethal Painkiller part of his persona, Khalil has distanced himself away from everyone he knows and loves in a new city, Akashic Valley, in order to find peace... but peace never comes easy for men with pasts like Khalil Payne and Painkiller. As his violent, destructive history crashes his idyllic new beginning, Khalil is thrusted back into action with a new mission - bring justice where he once gave out punishment - but to do that, he will first have to deal with and harness his darker side, Painkiller.