Since Ayatollah Khomeini brought revolution to Iran in 1979, the country has become a byword for radical Islam. Western documentary teams are seldom given access, but broadcaster and journalist Samira Ahmed has been given a rare opportunity to discover its rich, colourful culture and extraordinary history. In this first episode, Samira journeys to places rarely seen by Western audiences to reveal how the Persian Empire was born, the mysterious writing of its early people and how her powerful kings built a vast empire that became the envy of the ancient world.

From the Curio channel: BBC Channel.