A Number Wednesday, 10th September 2008 9pm to 10:10pm (70 mins) BBC1 Tom Wilkinson and Rhys Ifans lead in this shattering meditation on human identity. The playwright Caryl Churchill adapts her original play, examining the issue of human cloning via a thought-provoking, surprising and haunting father-son drama. Salter, a man in his early 60s, is confronted by his adult son, Be......