Explore the radical movement of Logical Positivism challenging traditional philosophy, rooted in Vienna Circle's scientific focus. Rejecting grand claims, embracing empiricism, and reshaping philosophy post-WWI. Discussing Einstein's influence, fleeing from Nazis, and shaping analytic tradition in America.

Experts in Islamic history discuss the Sunni-Shia split, origination from succession disputes after Prophet Muhammad's death. Debate on hereditary vs. selection principle for leadership, leading to political and theological division. Focus on key events like Husayn's martyrdom shaping Shia beliefs, and the rise of the Hidden Imam in Shia Islam.

Explore the world of Elizabethan revenge tragedy with guests Jonathan Bate, Julie Sanders, and Janet Clare. From the theatrical portrayal of vengeance on stage to the societal shift from medieval to Tudor legal systems, delve into the complexities of revenge narratives in works like 'Hamlet' and 'The Spanish Tragedy'. Discover the psychological depth of vengeful minds through soliloquies and the evolving codes of justice in the Elizabethan era.

Melvyn Bragg and guests Mary Beard, Catharine Edwards and Duncan Kennedy discuss the political regime and cultural influence of the Roman Emperor Augustus. Called the Augustan Age, it was a golden age of literature with Virgil's Aeneid and Ovid's Metamorphosis among its treasures. But they were forged amidst creeping tyranny and the demands of literary propaganda. Augustus tightened public morals, funded architectural renewal and prosecuted adultery. Ovid was exiled for his saucy love poems but Virgil's Aeneid, a celebration of Rome's grand purpose, was supported by the regime. Indeed, Augustus saw literature, architecture, culture and morality as vehicles for his values. He presented his regime as a return to old Roman virtues of forbearance, valour and moral rectitude, but he created a very new form of power. He was the first Roman Emperor and, above all, he established the idea that Rome would be an empire without end. Catharine Edwards is Professor of Classics and Ancient History at Birkbeck College, University of London; Duncan Kennedy is Professor of Latin Literature and the Theory of Criticism at the University of Bristol; Mary Beard is Professor of Classics at Cambridge University.

Melvyn Bragg and guests Justin Champion, Diane Purkiss and David Wootton discuss the trial of Charles I, recounting the high drama in Westminster Hall and the ideas that led to the execution.Begun on 20th January 1649, the trial culminated in the epoch-making execution of an English monarch. But on the way it was a drama of ideas about kingly authority, tax, parliamentary power and religion, all suffused with personal vendettas, political confusion and individual courage. It was also a forum in which the newly-ended Civil War and the events of Charles's reign were picked over by the people who had experienced them. Melvyn and guests recount the events of the trial, explore the central arguments and see whether, 350 years later, we can work out who really won.Justin Champion is Professor of the History of Early Modern Ideas at Royal Holloway, University of London; Diane Purkiss is a Fellow and tutor at Keble College, Oxford; David Wootton is Professor of History at the University of York.

Melvyn Bragg and guests Helen Bond, John Haldane and John Barclay discuss the influence of St Paul on the early Christian church and on Christian theology generally. St Paul joined the Christian church in a time of confusion and wonder. Jesus had been crucified and resurrected and the Christians believed they were living at the end of the world. Paul's impact on Christianity is vast: he imposed an identity on the early Christians and a coherent theology that thinkers from St Augustine to Martin Luther have grappled with. Crucially, Paul is responsible for changing Christianity from a Jewish reform movement into a separate and universal religion.Helen Bond is Senior Lecturer in the New Testament at the University of Edinburgh; John Haldane is Professor of Philosophy at the University of St Andrews; John Barclay is the Lightfoot Professor of Divinity at Durham University.

Melvyn Bragg and guests Steve Jones, Bill Amos and Eleanor Weston discuss the evolutionary history of the whale. The ancestor of all whales alive today was a small, land-based mammal with cloven hoofs, perhaps like a pig or a big mole. How this creature developed into the celebrated leviathan of the deep is one of the more extraordinary stories in the canon of evolution. The whale has undergone vast changes in size, has moved from land to water, lost its legs and developed specialised features such as filter feeding and echo location. How it achieved this is an exemplar of how evolution works and how natural selection can impose extreme changes on the body shape and abilities of living things. How the story of the whales was pieced together also reveals the various forms of evidence - from fossils to molecules - that we now use to understand the ancestry of life on Earth.Steve Jones is Professor of Genetics at University College London; Eleanor Weston is a mammalian palaeontologist at the Natural History Museum, London; Bill Amos is Professor of Evolutionary Genetics at Cambridge University.

Historians Andrew Wheatcroft, Claire Norton, and Jeremy Black discuss the Ottoman siege of Vienna in 1683, exploring its impact on European boundaries and the decline of Turkish influence. They delve into the Ottoman invasion, decision to attack Vienna, and the clash of civilizations during the siege. The aftermath of the siege and the historical analysis of Eastern European-Ottoman interactions are also explored.

Melvyn Bragg and guests Nicholas Vincent, David Carpenter and Michael Clanchy discuss the Magna Carta, the oft-proclaimed foundation of English liberties.The Magna Carta has been cited ever since its issue in 1215 as a foundation stone of English liberties. It includes clauses of universal justice, some of which are still on the statute book, but also sorted out the fishing rights in the upper Thames. Whether Magna Carta is a genuine proclamation of universal liberty or a hotchpotch of baronial self-interest has been debated ever since. Melvyn and his guests examine the ideas contained within it, assess their legacy and find out what really happened all those years ago in a tent in Runnymede.

Physicist Frank Close, Astronomer Jocelyn Bell Burnell, and Physicist Ruth Gregory delve into the mysteries of the vacuum of space. They discuss the historical perspectives, the debunking of the ether concept, the bustling activity within seemingly empty space, uncertainty principles in quantum mechanics, the quantum vacuum's energy fluctuations, and the intriguing force of dark energy driving the universe's expansion.