PlayMakers Repertory Company alternates two related plays over the next month, starting on Saturday with a double-header. Lorraine Hansberry’s 1959 drama, “A Raisin in the Sun” follows an African-American family’s move into an all-white neighborhood, while Bruce Norris’s 2009 Pulitzer Prize winner,“Clybourne Park,” tells the story of the white family that sold the home to them. Paul Green Theatre, UNC-CH. “Raisin” - 2 p.m. Saturday and Sunday; “Clybourne” - 7:30 p.m. Saturday (through 3/3). $15-$50. 919-962-7529; playmakersrep.org.