imagine…

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.

Gwyneth Paltrow, Kate Moss and Vogue's Anna Wintour contribute to the tale of Stella McCartney's rise from student at St Martins to her big break into the fashion elite. Footage shot by McCartney and dating back to 1985, alongside interviews and archive material, help paint this portrait of the designer.

Alan Yentob tells the inspirational story of Carlos Acosta, the gifted dancer who made the leap from the backstreets of Havana to become the first black principal dancer at the Royal Ballet. The film follows Acosta over six months as he embarks on the biggest challenge of his life - producing and choreographing his own show based on his upbringing in Cuba.

Alan Yentob tells the story of Joshua Reynolds’ portrait of Britain’s first non-white celebrity, Omai, which the Tate Gallery is fighting to keep in Britain. One of the artist’s greatest works, and the first ever grand portrait of a non-white subject, the picture captures the image of a man who became an overnight sensation in 18th-century London after being plucked from obscurity in Tahiti.