Dr. Martin Luther King Jr. is remembered today as an American hero: a bridge-builder, a shrewd political tactician, and a moral leader. Yet throughout his history-altering political career, he was often treated by U.S. intelligence and law enforcement agencies like an enemy of the state. This virtuosic documentary lays out a detailed account of the FBI surveillance that dogged King’s activism throughout the ’50s and ’60s, fueled by the racist and red-baiting paranoia of J. Edgar Hoover. In crafting a rich archival tapestry, featuring some revelatory restored footage of King, director Sam Pollard urges us to remember that true American progress is always hard-won.