At the heart of this episode is the birth of the Islamic religion in the person and teachings of the prophet Mohammed. Among the major questions examined here are: Why is the Koran God’s word? Why did the new religion spread so rapidly? What is the origin of the concept “jihad” (holy war) and why did the expansion into Spain prove to be so fruitful? The film was shot on original locations in nine Islamic nations. Among the interviewees is the Aga Khan, the head of the Ismailis.