Henry Louis Gates, Jr. helps actors Sigourney Weaver, Justina Machado, and Amy Ryan unearth surprising revelations about their family histories, forever altering how they see themselves.

Henry Louis Gates, Jr. journeys with film director Ava DuVernay, actor S. Epatha Merkerson, and musician Questlove to the unexpected places where their ancestors were scattered by slavery, upending their notions of African American history—and their own family trees.