Zoroastrianism

Kartir, an influential high priest under Ardeshir, aimed to purge Iran of all religions other than Zoroastrianism. What little is known of Kartir comes from inscriptions on cliff faces from the time of Shapur I.

Peter Owen Jones explores Karma in a Tibetan Buddhist monastery high in the mountains, and attends the 300th anniversary of a Sikh guru. A BBC Production.