Forest Whitaker portrays Ellsworth Bumpy Johnson, a crime boss in 1960s Harlem.
Season 4 follows Johnson as he "continues his bloody war for control of Harlem against New York's Mafia families, while contending with the arrival of gangster Frank Lucas (Rome Flynn)," an official synopsis reads.
He is also trying to come to terms with the fact that his daughter, portrayed by Antionette Crowe-Legacy, is working with the Black Panthers after Malcom X is assassinated.
Jason Alan Carvell had portrayed Malcolm X in earlier seasons.
Season 4, which will also star Ilfenesh Hadera, Lucy Fry, Erik LaRay Harvey, Michael Raymond James, Elvis Nolasco and Erik Palladino, was announced in 2023.