In the seventh episode of this epic saga inspired by the Mamluk slave-dynasty, the Sultan Al-Ghuri (Raad Rawi) dreams of victory against rebellious provincial leader Maya. Meanwhile Gregor (Rufus Wright) is in pursuit of missing slave-girl Sarah (Nina Yndis) and must venture into the catacombs beneath the city, haven to those who wish to escape the brutality of the City above. Tumanbay, the beating heart of a vast empire, is threatened by a rebellion in a far-off province and a mysterious force devouring the city from within. Gregor, Master of the Palace Guard, is charged by Sultan Al-Ghuri with the task of rooting out this insurgence and crushing it. Music - Sacha Puttnam Sound Design - Steve Bond, Jon Ouin Editors - Ania Przygoda, James Morgan Producers - Emma Hearn, Nadir Khan, John Dryden Written by Mike Walker Directed by John Dryden A Goldhawk production for BBC Radio 4.