Rev up your air guitars, fire up your loudest amps and get ready for new Sky Arts series, Greatest Guitar Riffs, airing next month over the course of three consecutive nights: 24th, 25th and 26th November. This three-part documentary series unpicks the workings of some of the most famous riffs in musical history, taking audiences on an exhilarating journey which tracks the personal impact of the guitar riff on three legendary guitarists - Black Sabbath's Tony Iommi, The Police's Andy Summers and Heart's Nancy Wilson.