All three BBC radio dramatisations of the bestselling fantasy trilogy – plus bonus material A breathtaking epic spanning multiple worlds, His Dark Materials follows the adventures of Lyra Belacqua and Will Parry, two children catapulted into a life-or-death struggle to save the future of the Cosmos. In Northern Lights, 11-year-old Lyra discovers dark forces at work involving kidnapped children and a mysterious substance called ‘Dust’.