The public television service announced Tuesday that the program about Walker will air Feb. 7 as part of the "American Masters" series.
Other PBS shows marking Black History Month in February include "American Promise," a coming-of-age documentary about two young men, and a documentary about a Mississippi state commission that investigated foes of segregation.
"American Promise" airs Feb. 3 on the "POV" showcase. "Spies of Mississippi" will air Feb. 10 on the "Independent Lens" program.
To mark Black History Month online, PBS.org will offer "Behind the Lens," about photographer Eunique Jones Gibson's portrayals of prominent African-Americans as youngsters.