"Part One: Absent Friends", Closing Theme by Matt Fitton , John Dorney , Paul McGann , Nicola Walker , Anna Acton , Hattie Morahan , John Heffernan , John Shrapnel , Nicholas Woodeson , Alex Kingston , Jeremy Clyde , Emma D'Inverno , Janie Dee , Kasia Koleczek , Tim McMullan , Ian Puleston-Davies , Richard Hope , Robert Bathurst , Beth Chalmers & Glen McCready