Greek tragedy and black gospel music are featured in "The Gospel at Colonus," which retells the legend of King Oedipus. Gospel performers include Clarence Fountain and the Five Blind Boys of Alabama, Brooklyn's Institutional Radio Choir, and J.J. Farley and the Original Soul Stirrers. Cast ... Messenger: Morgan Freeman. Oedipus: Clarence Fountain. Antigone: Isabell Monk.