The fourth season will explore the formative years, pioneering accomplishments, duelling philosophies and key personal relationships of Martin Luther King Jr. and Malcolm X. While King advanced racial equality through nonviolent protest, Malcolm X argued forcefully for Black empowerment, identity and self-determination. With their formidable wives, Coretta Scott King and Betty Shabazz, by their sides, King and Malcolm X became synonymous with the civil rights era and the fight for racial and economic justice. While they met only once and often challenged each other's views, neither would have been as successful without the other.