New Zealand's prime minister joins the show from the Commonwealth Heads of Government Meeting which is taking place in Trinidad.

Mohsen Makhmalbaf, the celebrated Iranian filmmaker, was a spokesman for Mir-Hossein Mousavi, Iran's opposition leader, in the country's June elections. He joins the show to talk about the progress of Iran's 'Green Revolution'.

Plus, Mo Ibrahim, the Sudanese-born British entrepreneur and philanthropist, explains why he decided not to award his annual prize for leadership in Africa this year and why he believes the continent's economies need to integrate.

The lead singer, guitarist and songwriter of legendary rock band Dire Straits, talks about his new solo album, Get Lucky.

 
Connie Heddegaard, the Danish minister in charge of the UN Climate Change Conference, talks about her hopes for the seminal environmental summit taking place in Copenhagen this December.

Plus, Irish author Eoin Colfer has written the sixth installment of Douglas Adams' much loved series The Hitchhikers Guide to the Galaxy. He talks about it here.