Laurie Taylor explores The World Service, talking to Marie Gillespie about her study into the role of the diasporic broadcasters at the heart of the BBC's foreign service. Even though the Service has derived much of its creative and diplomatic significance from these men and women, they've been largely absent from academic work and public debate. Professor Gillespie's work brings to light the invisible writers and intellectuals who've been responsible for the BBC's credibility as an international broadcaster. She's joined by Ramy Aly, a Middle Eastern scholar who has studied the BBC Arabic Service, in particular. Also, who decides when someone is a danger to themselves or others? Professor Gillian Bendelow discusses her research into the use of section 136 of the Mental Health Act 1983.

Producer: Jayne Egerton.