'The Courier' starring Benedict Cumberbatch is a well-made if underwhelming thriller

Set in the 1960s, ‘The Courier’ depicts a true story from the Cold War era. A British businessman, Greville Wynne (Benedict Cumberbatch), and his Soviet source, Colonel Oleg Penkovsky (Merab Ninidze), work together to help MI6 penetrate the Soviet nuclear programme. They hope to bring an end to the Cuban missile crisis.