Guest Stars Kit Connor voices Pantalaimon Will Keen as Father Hugh MacPhail Frank Bourke as Fra Pavel Joe Tandberg voices Iorek Byrnison Cristela Alonzo voices Hester Helen McCrory voices Stelmaria Andrew Scott as Col. John Parry Jamie Wilkes as DI Walters Robert Emms as Thomas David Langham as Father Garret Morfydd Clark as Sister Clara Peter Serafinowicz voices Iofur Raknison Joi Johannsson voices Iofur Raknison Ray Fearon as Mr Hanway Asheq Akhtar as Jotham Santelia