Melvyn Bragg and guests discuss the Renaissance obsession with Magic.
Sue Lawley's castaway is businessman Karan Bilimoria
Melvyn Bragg examines the 17th century idea that all knowledge arises from experience.
Melvyn Bragg and guests discuss the truth behind the empire of Babylon.
Sue Lawley's castaway is actress Geraldine James
Melvyn Bragg examines our knowledge of the planets in both our and other solar systems.
Sue Lawley's castaway is designer Sir Ken Adam
Melvyn Bragg looks at the politics behind the rise of religious freedom in England.
Sue Lawley's castaway is explorer Pen Hadow
Melvyn Bragg examines the number between 1 and -1, once denounced as the devil's work.