Professor Colin Renfrew examines the forgotten city of Hatra. The programme shows how this stone metropolis retained its buildings, unlike the mud-bricked city of Nineveh, which is now just a large mound or 'tell'. Renfrew visits the reconstructed gates and figures of winged bull-men that are all that is left of Nineveh, before illustrating the extraordinary society that existed at Hatra, which was influenced by the Romans yet remained independent.