EPISODE
SCHEDULE
A leading team of analysts buried in the heart of GCHQ secretly works to ward off a foreign cyber-attack on the country's electoral system.
21 February 1967, Kenya
1971, Newport, Monmouthshire, Wales, UK
5 April 1985, London, England, UK
14 August 1968, Birmingham, England, UK
1982 in Kiev, Ukrainian SSR, USSR [now Ukraine]
8 November 1992, Isleworth, London, England, UK
15 September 1972, Pensacola, Florida, USA