|Don Cheadle||Ralph ``Petey'' Greene|
|Chiwetel Ejiofor||Dewey Hughes|
|Taraji P. Henson||Vernell|
|Martin Sheen||E.G. Sonderling|
|Cedric the Entertainer||Waylon|
Outspoken ex-convict Ralph ``Petey'' Greene talks his way onto the air at a white-owned radio station in 1960s Washington, D.C. Fueled by the new music and social upheaval of the times, he courts controversy while becoming the voice of the black movement.