“February One: The Story of the Greensboro Four” recalls the 1960 sit-in by four North Carolina A&T freshmen at a Woolworth's lunch counter. It turned out to be the civil-rights movement's “catalyst,” says narrator Lesley Blair. Their story is told in re-creations and news clips, and in the comments of the four themselves (one, David Richamond, who died in 1990, is seen in old clips). Says Franklin McCain: “Manhood and dignity. That's what we were trying to get.”