Ivan Hewett reveals how music was used during the Cold War. The USA and the USSR both co-opted it as a potent weapon in their ideological struggle, but it slipped through their grasp and affected the outcome of the war in ways no-one could have foreseen. Featuring interviews with musicians, including Vladimir Ashkenazy, and with defectors, US State Department officials, and Oleg Gordievsky, a KGB agent who later spied for the British.