Presented by John Humphrys and Sarah Montague. Tom Feilden reports on approaches to sex education in the UK and Holland. Credit analyst Gavin Nolan discusses whether the massive injection of money from the taxpayer into the economy is showing any signs of working. Dr Lee Dunster, head of research at the MS Society, discusses whether lost brain function can be restored. Professor Dean Baker of the Centre for Economic and Policy Research in Washington says that credit rating agencies failed on competence. Peter Biles reports on the humanitarian situation in Zimbabwe. Councillor Peter Greenhalgh explains Swindon Borough Council's decision to stop funding the town's speed cameras. Nicola Stanbridge meets the archivists looking after a bizarre collection of material charting over 100 years of world music history. Thought for the Day with Rev Rosemary Lain-Priestley. Sarah Mukherjee reports on the latest findings of the Royal Agricultural Society into the state of England's soil. Headmaster Kevin Ward and Norman Wells of the Family Education Trust discuss whether more information given about sex can lead to fewer unplanned teenage pregnancies. Robert Peston explains why entire countries are in financial trouble. Novelist Jonathan Franzen discusses why the Peanuts comic strip has not aged. Computing consultant Robin Hamman and Guardian writer and blogger Kate Bevan discuss whether shorter forms of communication, such as Twitter, are overtaking blogs. Jim Muir reports on the steps that need to be taken to ensure a stable future for Iraq. Authors Matthew Bishop and Michael Edwards describe the new-found fascination with 'philanthrocapitalism'.