Peter Firth Harry Pearce Actor Nicola Walker Ruth Evershed Actor David Oyelowo Danny Hunter Actor Keeley Hawes Zoe Reynolds Actor Matthew Macfadyen Tom Quinn Actor Rory MacGregor Actor Shauna Macdonald Sam Buxton Actor Megan Dodds Actor Philippe De Grossouvre Guest Star Heshima Thompson Guest Star Ciaran Donnelly Director Simon Mirren Writer Jane Featherstone Executive Producer Gareth Neame Executive Producer Julie Scott Executive Producer