"Part Four: The Sonomancer", Part 3 by Nicholas Briggs , Marc Platt , John Dorney , Matt Fitton , Paul McGann , Alex Kingston , Derek Ezenagu , Vincent Franklin , Nicola Walker , Andrew Dickens , Mark Bonnar , Kirsty Besterman , Julia Hills , Rebecca Night , Robert Bathurst , James Caroll Jordan , Emma Cunniffe , John Banks , Laura Harding , Hamish Clark , Enzo Squillino Jnr , Hattie Morahan , Janet Fullerlove , Paul Marc Davis , Jacqueline King & Cory English