Alan Yentob presents a new seven-part series looking at the power and effect of the arts and their main protagonists. The elusive and intriguing Charles Saatchi has been hugely instrumental in shaping contemporary British art. As he launches his new gallery in London's former County Hall, this behind-the-scenes look reveals Saatchi's hands-on involvement in the collection's presentation, helped by partner Nigella Lawson.

A profile of Barbara Hepworth, the world's first internationally celebrated woman sculptor. Born in Yorkshire in 1903, she had to fight to establish herself in a world dominated by men, and could still wield a chisel in her seventies.

More than just a musical genre, hip-hop has become a global youth culture. But why does the voice of young black America resonate equally with British teenagers from city high-rises and suburban semis? Alan Yentob embarks on a journey of discovery, encountering both young UK rappers and big US stars.