Richard Coles presents a discussion series looking at collaborations between two musicians.http://www.bbc.co.uk/programmes/b00h30yr
Richard analyses the partnership between Walter Becker and Donald Fagen, who formed the band Steely Dan in 1971. He is joined by author Brian Sweet and music journalist David Hepworth to analyse how the collaboration between Becker and Fagen developed and what effect it had on the popular music of the time. The programme also features extracts of some of the band's music and archives of interviews given by the band members over the years.
And here's a world clock to help you find out what 23:30 in England equals in your part of the world.