Tom Baker stars in this BBC Radio 4 full-cast dramatisation of John le Carré’s powerful thriller. In the third year of perestroika, London publisher Barley Blair is sent a manuscript from Moscow. Exposing Russian nuclear threats as a sham, the information - if it’s genuine - could shatter East-West relations. Jazz-loving, hard-drinking Blair is hardly the spymasters’ idea of the perfect agent, yet they are forced to send him to Moscow to make contact. But the Cold War thaws...