The Looking Glass War by John le Carré

The Looking Glass War
When word reaches The Department, an ailing section of British military intelligence, that Soviet missiles are being installed close to the West German border, former spy Fred Leiser is lured back from retirement to investigate. But the world has changed since The Department's glory days during the Second World War. The harsh realities of the Cold War now prevail, and there is no place for heroes.
Dramatised by Shaun McKenna.