Melvyn Bragg and guests discuss the military order founded around 1119, twenty years after the Crusaders captured Jerusalem. For almost 200 years the Knights Templar were a notable fighting force and financial power in the Crusader States and Western Europe. Their mission was to protect pilgrims in the Holy Land, and they became extremely wealthy yet, as the crusader grip on Jerusalem slipped, their political fortune declined steeply. They were to be persecuted out of existence, with their last grand master burned at the stake in Paris in 1314, and that sudden end has contributed to the strength of the legends that have grown up around them.

With

Helen Nicholson

Mike Carr

And

Jonathan Phillips

Producer: Simon Tillotson

Melvyn Bragg and guests discuss an atomic particle that's become inseparable from modernity. JJ Thomson discovered the electron 125 years ago, so revealing that atoms, supposedly the smallest things, were made of even smaller things. He pictured them inside an atomic ball like a plum pudding, with others later identifying their place outside the nucleus - and it is their location on the outer limit that has helped scientists learn so much about electrons and with electrons. We can use electrons to reveal the secrets of other particles and, while electricity exists whether we understand electrons or not, the applications of electricity and electrons grow as our knowledge grows. Many questions, though, remain unanswered.

With

Victoria Martin

Harry Cliff

And

Frank Close

Producer: Simon Tillotson

Melvyn Bragg and guests discuss Plato's account of the once great island of Atlantis out to the west, beyond the world known to his fellow Athenians, and why it disappeared many thousands of years before his time. There are no sources for this story other than Plato, and he tells it across two of his works, the Timaeus and the Critias, tantalizing his readers with evidence that it is true and clues that it is a fantasy. Atlantis, for Plato, is a way to explore what an ideal republic really is, and whether Athens could be (or ever was) one; to European travellers in the Renaissance, though, his story reflected their own encounters with distant lands, previously unknown to them, spurring generations of explorers to scour the oceans and in the hope of finding a lost world.

The image above is from an engraving of the legendary island of Atlantis after a description by Athanasius Kircher (1602-1680).

With

Edith Hall

Christopher Gill

And

Angie Hobbs

Producer: Simon Tillotson

Melvyn Bragg and guests discuss George Orwell's (1903-1950) final novel, published in 1949, set in a dystopian London which is now found in Airstrip One, part of the totalitarian superstate of Oceania which is always at war and where the protagonist, Winston Smith, works at the Ministry of Truth as a rewriter of history: 'Who controls the past,' ran the Party slogan, 'controls the future: who controls the present controls the past.' The influence of Orwell's novel is immeasurable, highlighting threats to personal freedom with concepts he named such as doublespeak, thoughtcrime, Room 101, Big Brother, memory hole and thought police.

With

David Dwan

Lisa Mullen

And

John Bowen

Producer: Simon Tillotson

Melvyn Bragg and guests discuss the origin of this personification of the English everyman and his development as both British and Britain in the following centuries. He first appeared along with Lewis Baboon (French) and Nicholas Frog (Dutch) in 1712 in a pamphlet that satirised the funding of the War of the Spanish Succession. The author was John Arbuthnot (1667-1735), a Scottish doctor and satirist who was part of the circle of Swift and Pope, and his John Bull was the English voter, overwhelmed by taxes that went not so much into the war itself but into the pockets of its financiers. For the next two centuries, Arbuthnot’s John Bull was a gift for cartoonists and satirists, especially when they wanted to ridicule British governments for taking advantage of the people’s patriotism.

The image above is by William Charles, a Scottish engraver who emigrated to the United States, and dates from 1814 during the Anglo-American War of 1812.

With

Judith Hawley

Miles Taylor

And

Mark Knights

Producer: Simon Tillotson

Melvyn Bragg and guests discuss the largest and arguably the most astonishing religious structure on Earth, built for Suryavarman II in the 12th Century in modern-day Cambodia. It is said to have more stone in it than the Great Pyramid of Giza, and much of the surface is intricately carved and remarkably well preserved. For the last 900 years Angkor Wat has been a centre of religion, whether Hinduism, Buddhism or Animism or a combination of those, and a source of wonder to Cambodians and visitors from around the world.

With

Piphal Heng

Ashley Thompson

And

Simon Warrack

Producer: Simon Tillotson

Melvyn Bragg and guests discuss the celebrated Welsh poet, Dylan Thomas (1914 - 1953). He wrote some of his best poems before he was twenty in the first half of his short, remarkable life, and was prolific in the second half too with poems such as those set in London under the Blitz and reworkings of his childhood in Swansea, and his famous radio play Under Milk Wood (performed after his death). He was read widely and widely heard: with his reading tours in America and recordings of his works that sold in their hundreds of thousands after his death, he is credited with reviving the act of poetry as performance in the 20th century.

With

Nerys Williams

John Goodby

And

Leo Mellor

Producer: Simon Tillotson

Melvyn Bragg and guests discuss the abrupt transformation of stars after shining brightly for millions or billions of years, once they lack the fuel to counter the force of gravity. Those like our own star, the Sun, become red giants, expanding outwards and consuming nearby planets, only to collapse into dense white dwarves. The massive stars, up to fifty times the mass of the Sun, burst into supernovas, visible from Earth in daytime, and become incredibly dense neutron stars or black holes. In these moments of collapse, the intense heat and pressure can create all the known elements to form gases and dust which may eventually combine to form new stars, new planets and, as on Earth, new life.

The image above is of the supernova remnant Cassiopeia A, approximately 10,000 light years away, from a once massive star that died in a supernova explosion that was first seen from Earth in 1690

With

Martin Rees

Carolin Crawford

And

Mark Sullivan

Producer: Simon Tillotson

Melvyn Bragg and guests discuss ideas of Georg Wilhelm Friedrich Hegel (1770 - 1831) on history. Hegel, one of the most influential of the modern philosophers, described history as the progress in the consciousness of freedom, asking whether we enjoy more freedom now than those who came before us. To explore this, he looked into the past to identify periods when freedom was moving from the one to the few to the all, arguing that once we understand the true nature of freedom we reach an endpoint in understanding. That end of history, as it's known, describes an understanding of freedom so far progressed, so profound, that it cannot be extended or deepened even if it can be lost.

With

Sally Sedgwick

Robert Stern

And

Stephen Houlgate

Producer: Simon Tillotson

Melvyn Bragg and guests discuss the Czech educator Jan Amos Komenský (1592-1670) known throughout Europe in his lifetime under the Latin version of his name, Comenius. A Protestant and member of the Unity of Brethren, he lived much of his life in exile, expelled from his homeland under the Catholic Counter-Reformation, and he wanted to address the deep antagonisms underlying the wars that were devastating Europe especially The Thirty Years War (1618-1648). A major part of his plan was Universal Education, in which everyone could learn about everything, and better understand each other and so tolerate their religious differences and live side by side. His ideas were to have a lasting influence on education, even though the peace that followed the Thirty Years War only entrenched the changes in his homeland that made his life there impossible.

The image above is from a portrait of Comenius by Jürgen Ovens, 1650 - 1670, painted while he was living in Amsterdam and held in the Rikjsmuseum

With

Vladimir Urbanek

Suzanna Ivanic

And

Howard Hotson

Producer: Simon Tillotson