Peter Firth Harry Pearce Actor Hugh Simon Malcolm Wynn-Jones Actor David Oyelowo Danny Hunter Actor Keeley Hawes Zoe Reynolds Actor Matthew Macfadyen Tom Quinn Actor Rory MacGregor Colin Wells Actor Jenny Agutter Tessa Phillips Actor Graeme Mearns Jed Kelley Actor Esther Hall Ellie Simm Actor Heather Cave Maisis Simm Actor Lisa Eichhorn Guest Star Lisa Faulkner Guest Star Megan Dodds Guest Star Karen Westwood Guest Star Adam Kotz Guest Star Ken Bones Guest Star Bharat Nalluri Director David Wolstencroft Writer Stephen Garrett Executive Producer Gareth Neame Executive Producer