Peter Firth Harry Pearce Actor Hugh Simon Actor Nicola Walker Ruth Evershed Actor Rupert Penry-Jones Adam Carter Actor David Oyelowo Danny Hunter Actor Keeley Hawes Zoe Reynolds Actor Matthew Macfadyen Tom Quinn Actor Rory MacGregor Actor Shauna Macdonald Sam Buxton Actor Olga Sosnovska Fiona Carter Actor Raza Jaffrey Zafar Younis Actor Richard Harrington Actor Hannah Storey Guest Star Cosh Omar Guest Star Dominic Mafham Guest Star Justin Chadwick Director Ben Richards Writer Simon Crawford-Collins Executive Producer Jane Featherstone Executive Producer Gareth Neame Executive Producer Julie Scott Executive Producer