The Christian movement extinguished early in the history of the Church, the Gnostics still exert a powerful grip on our imaginations. Who were – and are – they, and why do their beliefs so inspire blockbuster writers such as Dan Brown and Philip Pullman?

The Gnostics brilliantly illuminates the mystical movement that teaches knowledge of God rather than unquestioning faith. In today's multicultural world, the Gnostic doctrine of personal over organised religion is growing hugely in influence.

• Discover the myths and practices of this ancient movement

• Follow the path of Gnosticism through the triumphs and tragedies of the Cathars, the Manichaeans and, in today's Iraq, the Mandaeans

• Witness the dramatic discoveries of the Gnostic gospels – including the Gospel of Judas, lost for fifteen centuries