Prince: A Purple Reign.

Part of BBC Four's Black Music Legends of the 1980s, this documentary explores how Prince - showman, artist, enigma - revolutionized the perception of black music in the 1980s with worldwide hits such as "1999," "Kiss," "Raspberry Beret" and "Alphabet Street." He became a global sensation with the release of the Oscar-winning, semi-autobiographical movie "Purple Rain" in 1984, embarking on an incredible journey of musical self-discovery that continues to this day.