As credited
Sir Reginald Walker ... Ian Redford
James Philby ... Tim Preece
Agnes Browne ... Caroline Faber
Simon Walker ... Laurence Fox
Christopher Foyle ... Michael Kitchen
Paul Milner ... Anthony Howell
Stephen Beck ... Alan Howard
Arthur Browne ... Will Knightley
Brian ... Charlie Hawkins
Samantha Stewart ... Honeysuckle Weeks
Tim ... Barney Clark
Sgt Eric Rivers ... Geoffrey Freshwater
Lucy Markham ... Emily Blunt
Harry Markham ... Luke de Woolfson
Brigadier Harcourt ... Christopher Benjamin
Captain Jack Devlin ... Richard Wills-Cotton
Lady Alice Walker ... Sarah Winman
Albert Clarke ... Darren Tighe
Michael Connor ... Thomas Fisher
Vicar ... Ian Barritt
Hilda Pearce ... Ellie Haddington