Iconoclastic filmmaker John Sayles continues his extraordinary examination of the complexities and shifting identities of American sub-cultures in this fable about the birth of rock n’ roll starring Gary Clark Jr., who makes an electrifying film debut, and co-starring Danny Glover, blues legend Keb' Mo', Charles S. Dutton, Lisa Gay Hamilton, Stacy Keach and Mary Steenburgen.  PG-13.  123 min.  (Emerging Pictures)

• National Board of Review /(One of) Top Ten Independent Films