Seven celebrities of differing faiths and beliefs tackle the 2,200km Sultans Trail by road and on foot in a modern-day pilgrimage across Europe to the historic city of Istanbul.

Life on the Sultans Trail begins to challenge the celebrities as Adrian Chiles tells the group he is struggling with the purpose of pilgrimage in the face of their experiences.

The celebrities set off on the final leg of their pilgrimage and arrive in Turkey, where they head for the magnificent Suleymaniye Mosque in the historic city of Istanbul.