The ultimate music contest continues, as BBC Young Musician 2012 shines a spotlight on some of the UK's most talented young percussionists in the last of five category finals from the Royal Welsh College of Music and Drama in Cardiff. Clemency Burton-Hill introduces extensive highlights from their performances, with behind-the-scenes access and insightful comment and analysis. Rhythm takes centre stage, as we witness a spectacular display of technique, showmanship and passion from five percussionists: 18-year-olds James Larter, Richard Rayner and Molly Lopresti, and 16-year-olds Peter Rayner and Hyun-gi Lee. Expect the unexpected from a mostly modern repertoire, which features backing tracks, shouting and self-penned compositions.With the semi-final line up almost complete, each of the five young percussionists will be hoping that their journey doesn't end here. They'll be aiming to convince the judges that they deserve the one remaining place in the semi-final, taking them a step closer to the coveted title, BBC Young Musician 2012.