It is Christmas Eve and Will has been transported to a different time, 1875. Hawkin risks his life to break a spell and free a tome of ancient knowledge. The book speaks of hidden things - of real magic, of rocks and trees and stars. Listen on headphones for 3D immersive sound. #TheDarkIsRising

Will Stanton: Noah Alexander John Smith/Paul Stanton/Mr Beaumont: Thomas Arnold Bus Conductor/Jamaican Old One/James Stanton: Danny Bailey Stephen Stanton: Simon Bubb Mrs Stanton/Mrs Pettigrew/Dr Armstrong: Amanda Hadingue The Walker/Hawkin: Toby Jones Narrator: Simon McBurney The Rider/Mr Mithothin/Mr Stanton/Farmer Dawson: Tim McMullan Merriman: Paul Rhys Maggie Barnes/Mary Stanton: Natasha Stone The Lady/Miss Greythorne: Harriet Walter Herne: Miles Yekinni The chorister: Vinay Singh Radio announcer: Samuel West Soundscape design: Gareth Fry Music: Josh Sneesby Original songs by Johnny Flynn, Luisa Gerstein and Héloïse Tunstall-Behrens Adapted for audio by Robert Macfarlane and Simon McBurney Dramaturg: James Yeatman Director: Simon McBurney Producers: Catherine Bailey and Tim Bell A Complicité and Catherine Bailey Production for BBC World Service Commissioned by Simon Pitts