Movie History The Black Panthers: Vanguard of the Revolution 2015 The Black Panthers: Vanguard of the Revolution 2015 The Black Panthers: Vanguard of the Revolution -- Independent Lens 2015 Sing Your Song 2011 Sing Your Song 2011 William Kunstler: Disturbing the Universe 2009 William Kunstler: Disturbing the Universe 2009 Greased Lightning 1977 Greased Lightning 1977