Historian Bettany Hughes travels to India, Greece and China on the trail of three giants of ancient philosophy. To begin, she investigates the revolutionary ideas of the Buddha.

Series in which historian Bettany Hughes investigates three giants of ancient philosophy. In the second episode she is in Greece, on the trail of the hugely influential maverick thinker Socrates, who was executed for his beliefs.

In the final episode, Bettany travels to China on the trail of Confucius, a great sage of Chinese history whose ideas have fundamentally shaped the country of his birth for around 2,500 years.