Based on Jennie Rooney's best-selling novel of the same name.
The year is 2000 and Joan Stanley is living in contented retirement in suburbia at the turn of the millennium. Her tranquil life is suddenly disrupted when she's arrested by MI5 and accused of providing intelligence to Communist Russia.
Cut to 1938 where Joan is a Cambridge physics student who falls for young communist Leo Galich and through him, begins to see the world in a new light.
Working at a top-secret nuclear research facility during WWII, Joan comes to the realisation that the world is on the brink of mutually assured destruction. Confronted with an impossible question - what price would you pay for peace? - Joan must choose between betraying her country and loved ones, or saving them.
Actor: Tom Hughes
Actor: Stephen Campbell Moore
Actor: Judi Dench
Cinematographer: Zac Nicholson
Actor: Robin Soans
Writer: Lindsay Shapero
Actor: Tereza Srbova
Actor: Simon Ludders
Actor: Sophie Cookson
Actor: Laurence Spellman
Actor: Ciarán Owens
Actor: Kevin Fuller
Director: Trevor Nunn
Music: George Fenton
Producer: David Parfitt