Hilary Mantel on how fiction changes when adapted for stage or screen. Each medium, she says, draws a different potential from the original. She argues that fiction, if written well, doesn't betray history, but enhances it. When fiction is turned into theatre, or into a film or TV, the same applies - as long as we understand that adaptation is not a secondary process or a set of grudging compromises, but an act of creation in itself. And this matters. "Without art, what have you to inform you about the past?" she asks. "What lies beyond is the unedited flicker of closed-circuit TV."

The programme is recorded in Stratford-Upon-Avon in front of an audience, with a question and answer session, chaired by Sue Lawley. The producer is Jim Frank.