The outrage of punk rock faded during the early 1980s, and mainstream music recovered its composure, filling arenas across the world with classic rock sounds and heavy metal power. But a new, sparse sound with a style all its own was bubbling up from the street, bringing a combination of tough, urban attitude and cool electronic sophistication to rock and roll. Planet Rock, the final episode in BBC's 10-part series Dancing in the Street, traces the development of rap and electrofunk from their roots in the streets of the Bronx to their branches all over the globe.