PLEASE NOTE: We are unable to offer transcripts for our programme interviews. Today is broadcast live and the running order is subject to change.
The Green Party has elected a solo leader for the first time ever. It has moved from a system of having two principal speakers. MEP Caroline Lucas, who has been elected as leader, discusses the changes in the party.
Storms which left one person dead in mid-Wales and caused floods across Wales and south-west England are set to spread to other parts of the UK. Wales correspondent Mark Hutchings and Ruth Burnett, who has been flooded out of her home in Machen, Caerphilly, South Wales and is staying with a neighbour, explain how bad the situation is.
There is a global shortage of the radioactive imaging agents known as medical isotopes, which are used to diagnose and treat serious illness. Dr Andrew Hilson, a specialist in Nuclear Medicine at the Royal Free Hospital in London, discusses the impact on diagnostic tests.
A BBC investigation has found that almost 150 people in Britain have bought academic qualifications from a network of internet-based, fake universities in the US. Phil Kemp, from the Donal MacIntyre programme on Radio 5 Live, discusses how he tracked down two people who acquired PhDs and have been using the title 'doctor'.
Sports news with Rob Bonnet.
Voting has started in Pakistan to elect a successor to Pervez Musharraf. He resigned as president last month rather than risk impeachment. Correspondent Barbara Plett reports from Islamabad.
What do the next eight weeks or so hold for John McCain and Barack Obama? James Naughtie, who has spent the last two weeks covering the Democratic and Republican conventions in Denver and St Paul, gives his thoughts on the run up to the election.
Thought for the day with Reverend Joel Edwards, general director of the Evangelical Alliance.
Will there be a windfall tax on energy companies? Political correspondent Norman Smith and Professor Dieter Helm, of New College, Oxford, discusses whether there has been a unified message from the government.
The credit crunch is likely to last well into 2010, the head of the UK's largest mortgage provider has warned. HBOS chief Andy Hornby discusses the impact of US house prices with business editor Robert Peston.
If you read a great work of literature that's been translated, do you lose much of the meaning of the original? Times columnist Michael Gove, who is also in the shadow cabinet, said that reading translated literature involved a "loss of nuance, a sacrifice of subtlety, which few will admit to". He discusses this view with Professor Tony Briggs, who translated Penguin's War and Peace.
What does all the political sound and fury about Gordon Brown this week signify about his future? BBC's Editor of Political Research David Cowling looks through the emotions of the week with a poetry group in a library in Dulwich, South London.
After more than 30 years, and at a cost of some £4.4bn, scientists are finally ready to switch on the most ambitious physics experiment the world has ever seen. Tom Feilden reports on the Large Hadron Collider, a giant atom smashing machine buried beneath the Alps.
Is the housing market really in a precarious position? Economics editor Hugh Pym and Bill Emmott, former editor of the Economist, discuss whether the media has blown things out of all proportion.
Why is a politician's personal history so important in American politics? Joe Bageant, author and self-confessed redneck from Virginia, Simon Schama, of Columbia University, and Bonnie Greer, US playwright, discuss whether a politician with a personal story is more likely to gain the trust of voters.
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