National Geographic documentary on Martin Luther King Jr. helps drive change in the United States in the face of bitter opposition, not least from opponents within the U.S. government; King is subjected to a fierce campaign of intimidation by J. Edgar Hoover's FBI.
| Actor | Role |
|---|---|
 Jason Alan CarvellNarrator | Narrator |
 Martin Luther King Jr.Self (archive footage) | Self (archive footage) |
 Coretta Scott KingSelf (archive footage) | Self (archive footage) |
 Rosa ParksSelf (archive footage) | Self (archive footage) |
| DDorothy CottonSelf - Civil Rights Leader | Self - Civil Rights Leader |
 Bonnie GreerSelf - Playwright | Self - Playwright |
| DDr. Cheryl SterlingSelf - Professor of Black Studies | Self - Professor of Black Studies |
| RRichard Gid PowersSelf - Professor / FBI Historian | Self - Professor / FBI Historian |
| TTim WeinerSelf - Reporter | Self - Reporter |
 Lyndon B. JohnsonSelf (archive footage) | Self (archive footage) |
 Dwight D. EisenhowerSelf (archive footage) | Self (archive footage) |
| JJames Earl RaySelf (archive footage) | Self (archive footage) |
 J. Edgar HooverSelf (archive footage) | Self (archive footage) |