Gregory J. Read Director, Writer Eddie Redmayne Alex Forbes Actor Tom Sturridge Nigel Colby Actor Toni Collette Sally Rowe Actor Richard Roxburgh Insp. McKenzie Actor Patrick Malahide Headmaster Actor Kate Maberly Susan Mueller Actor Jonathan Overton Josh Actor Amit Shah Raj Actor David Threlfall John Colby Actor Cathryn Bradshaw Helen Colby Actor Hugh Sachs Rev. Donaldson Actor Jonathan Shteinman Producer Piers Tempest Producer Carol Hughes Producer Richard Johns Co-Producer Mark Warner Film Editing Carlo Giacco Original Music Steven Jones-Evans Production Design Lucinda Thomson Art Director Odile Dicks-Mireaux Costume Design