Melvyn Bragg and guests discuss the truth about Babylon. Six thousand years ago, between the Tigris and the Euphrates, the first cities were being built. The great empire to spring from the region was Babylon, which held sway for over a thousand years and in that time managed to garner an extraordinarily bad press: it’s associated with the Tower of Babel, with Nineveh where Jonah is sent to preach repentance and, perhaps most famously, with “Mystery, Babylon the Great, the Mother of Harlots and Abominations of the Earth” - the whore of Babylon, who in Revelation is taken to personify the city itself. It’s not just the Bible; Herodotus described the Babylonians as effeminate, lascivious and decadent as well.But what is the true story? Classics in this country has meant a study of Greece and Rome, but there is an increasingly vocal contingent that claims that Babylonian culture has been hugely undervalued, and that there is a great wealth of extraordinary literature waiting to be translated.With Eleanor Robson, Lecturer in the History and Philosophy of Science at Cambridge University; Irving Finkel, Curator in the Department of the Ancient Near East at the British Museum; Andrew George, Professor of Babylonian at the School of Oriental and African Studies.

Melvyn Bragg and guests discuss our knowledge of the planets in both our and other solar systems. Tucked away in the outer Western Spiral arm of the Milky Way is a middle aged star, with nine, or possibly ten orbiting planets of hugely varying sizes. Roughly ninety-two million miles and third in line from that central star is our own planet Earth, in thrall to our Sun, just one of the several thousand million stars that make up the Galaxy.Ever since Galileo and Copernicus gave us a scientific model of our own solar system, we have assumed that somewhere amongst the myriad stars there must be other orbiting planets, but it took until 1995 to find one. ‘51 Pegasus A’ was discovered in the Pegasus constellation and was far bigger and far closer to its sun than any of our existing theories could have predicted. Since then 121 new planets have been found. And now it is thought there may be more planets in the skies than there are stars.What causes a planet to form? How do you track one down? And how likely is there to be another one out there with properties like the Earth’s?With Paul Murdin, Senior Fellow at the Institute of Astronomy in Cambridge; Hugh Jones, planet hunter and Reader in Astrophysics at Liverpool John Moores University; Carolin Crawford, Royal Society Research Fellow at the Institute of Astronomy in Cambridge.

Melvyn Bragg and guests discuss the ideas and politics behind the idea of religious toleration. In 1763 Voltaire remarked that "of all religions, the Christian is undoubtedly that which should instil the greatest toleration, although so far the Christians have been the most intolerant of all men". Christian intolerance was brutally enforced across Western Europe in the Middle Ages and the Reformation, with inquisitions, executions, church courts and brandings with hot irons. But during the English Civil War a variety of Christian sects sprang up which challenged the imposition of state religion and opened the floodgates to religious diversity.What were the politics and philosophy behind the idea of toleration in England? Did the rise of toleration go hand in hand with the rise of the secular, or were tolerationists – in fact – deeply religious? And how does toleration differ from tolerance?With Justin Champion, Professor of the History of Early Modern Ideas at Royal Holloway, University of London; David Wootton, Professor of Intellectual History at Queen Mary, University of London; Sarah Barber, Senior Lecturer in History at Lancaster University.

Melvyn Bragg and guests discuss the history of the number between 1 and -1, which has strange and uniquely beguiling qualities. Shakespeare’s King Lear warned, “Nothing will come of nothing”. The poet and priest John Donne said from the pulpit, “The less anything is, the less we know it: how invisible, unintelligible a thing is nothing”, and the English monk and historian William of Malmesbury called them “dangerous Saracen magic”. They were all talking about zero, the number or symbol that had been part of the mathematics in the East for centuries but was finally taking hold in Europe.What was it about zero that so repulsed their intellects? How was zero invented? And what role does zero play in mathematics today?With Robert Kaplan, co-founder of the Maths Circle at Harvard University and author of The Nothing That Is: A Natural History of Zero; Ian Stewart, Professor of Mathematics at the University of Warwick; Lisa Jardine, Professor of Renaissance Studies at Queen Mary, University of London.

Melvyn Bragg and guests discuss what defines a hero and what place they had in classical society. On the fields of Troy a fallen soldier pleaded with Achilles, the great hero of the Greeks, to spare his life. According to Homer, Achilles replied, “Do you not see what a man I am, how huge, how splendid.And born of a great father and the mother who bore me immortal?Yet even I have also my death and strong destiny, And there shall be a dawn or an afternoon or a noontime,When some man in the fighting will take the life from me alsoEither with a spear cast or an arrow flown from the bow string”.With that, he killed him. Heroes have special attributes, but not necessarily humility or compassion. How did the Greeks define their heroes? What place did the hero have in classical society and what do modern ideas of heroism owe to the heroes of the golden age?With Angie Hobbs, Lecturer in Philosophy at the University of Warwick and author of Plato and the Hero: Courage, Manliness and the Impersonal Good; Anthony Grayling, Reader in Philosophy at Birkbeck College, University of London; Paul Cartledge, Professor of Greek History at the University of Cambridge.

Melvyn Bragg and guests discuss tea, the first truly global commodity. After air and water, tea is the most widely consumed substance on the planet and the British national drink. In this country it helped define class and gender, it funded wars and propped up the economy of the Empire. The trade started in the 1660s with an official import of just 2 ounces, by 1801 24 million pounds of tea were coming in every year and people of all classes were drinking an average two cups a day. It was the first mass commodity, and the merchant philanthropist Jonas Hanway decried its hold on the nation, “your servants' servants, down to the very beggars, will not be satisfied unless they consume the produce of the remote country of China”.What drove the extraordinary take up of tea in this country? What role did it play in the global economy of the Empire and at what point did it stop becoming an exotic foreign luxury and start to define the essence of Englishness?With Huw Bowen, Senior Lecturer in Economic and Social History at the University of Leicester; James Walvin, Professor of History at the University of York; Amanda Vickery, Reader in History at Royal Holloway, University of London.

Melvyn Bragg and guests discuss a problematic notion which can be an emotional condition, a syndrome, an extreme or over-reaction, or the physical signs of trauma. The term ‘hysteria’ was first used in Greece in the 5th century BC by Hippocratic doctors. They were trying to explain an illness whose symptoms were breathing difficulties and a sense of suffocation, and whose sufferers were seen chiefly to be recently bereaved widows. The explanation was thought to be a wandering womb putting pressure on other organs. The use that Sigmund Freud put to the term was rather different, but although there is no wandering womb in his notion of hysteria, there is still a mysterious leap from the emotional to the physical, from the mind to the body. What is hysteria? How can emotional experiences cause physical illnesses? And has hysteria’s association with old stereotypes of femininity put it off the modern medical map? With Juliet Mitchell, Professor of Psychoanalysis and Gender Studies at the University of Cambridge and author of Mad Men and Medusas: Reclaiming Hysteria and the Effects of Sibling Relations on the Human Condition; Rachel Bowlby, Professor of English at the University of York who has written the introduction to the latest Penguin translation of Sigmund Freud and Joseph Breuer’s Studies in Hysteria; Brett Kahr, Senior Clinical Research Fellow in Psychotherapy and Mental Health at the Centre for Child Mental Health in London.

Melvyn Bragg and guests discuss the poetry, the tragedy and the idealism of the Later Romantics. There must have been something extraordinary about the early 19th century, when six of the greatest poets in the English language were all writing. William Blake was there and Wordsworth and Coleridge had established themselves as the main players in British poetry, when the youthful trio of Byron, Shelley and Keats erupted – if not straight onto the public stage, then at least onto the literary scene. The great chronicler of the age was William Hazlitt, whose romantic maxim was: “Happy are they who live in the dream of their own existence and see all things in the light of their own minds; who walk by faith and hope; to whom the guiding star of their youth still shines from afar and into whom the spirit of the world has not yet entered…the world has no hand on them.” How fitting an epitaph is that for the three great poets who all died tragically young? What were the ideals that drove them and how did their unconventional lifestyles infect the poetry they left behind?With Jonathan Bate, Professor of English Literature at the University of Warwick; Robert Woof, Director of the Wordsworth Trust; Jennifer Wallace, Director of Studies in English at Peterhouse, Cambridge.

Melvyn Bragg and guests discuss the concept of original sin and its influence in Christian Europe. Genesis tells the Bible’s story of creation, but it also carries within it a tale of the ‘fall of mankind’. After their primal transgression, Adam and Eve are banished from Eden and cursed by God:“Unto the woman he said, I will greatly multiply thy sorrow and thy conception; in sorrow thou shalt bring forth children; and thy desire shall be to thy husband, and he shall rule over thee.And unto Adam he said, Because thou hast hearkened unto the voice of thy wife, and hast eaten of the tree, of which I commanded thee, saying, Thou shalt not eat of it: cursed is the ground for thy sake; in sorrow shalt thou eat of it all the days of thy life.”What effect has this passage had on western culture, and how did the concept of an ‘original sin’ influence gender and morality in Christian Europe?With Martin Palmer, theologian and Director of the International Consultancy on Religion, Education and Culture; Griselda Pollock, Professor of Art History at the University of Leeds; John Carey, Emeritus Professor of English Literature at Oxford University.

Melvyn Bragg and guests discuss the astonishing productivity of the Chinese Golden Age. 400 BC to 200 AD is known as the Axial Age, when great civilisations in Asia and the Mediterranean forged the ideas that dominated the next two thousand years. In China the equivalent to the Golden Age in Greece was the Warring States Period. It was a time of political turmoil, economic change and intellectual ferment that laid the foundations for the first Chinese Empire. Astronomy was systematised, the principles of Yin and Yang were invented, Confucianism grew and Taoism emerged, as a hundred schools of thought are reputed to have vied for the patronage of rival kings.Why was a period of war such a fertile age for culture and thought, what kinds of ideas were developed and how do they still inform the thinking of nearly a fifth of the world’s population?With Dr Chris Cullen, Director of the Needham Research Institute at Cambridge University; Dr Vivienne Lo, Lecturer at the Wellcome Trust Centre for the History of Medicine; Carol Michaelson, Assistant Keeper of Chinese Art in the Department of Oriental Antiquities at the British Museum.