The reality though is far more stark and brutal. With interviews from the major players in espionage we separate fact from fiction to reveal what the life of a spy is really like.

Former Chief of MI6, Sir John Scarlett, talks about what makes a good MI6 officer and how you handle double-agents. MI6 is renowned for its skill at running agents and extracting information from the most sensitive of sources. This unique expertise is all thanks to the very first Chief of MI6, Mansfield Cumming. Cumming was an eccentric spymaster who would startle potential recruits mid interview by stabbing his wooden leg.

The Second World War sees the Secret Service achieve its greatest triumphs. The extraordinary Mavis Batey reveals her highly classified intelligence work. Part of a top-secret team of code-breakers she hacks into Enigma, the world’s most secure encryption system, to listen into enemy war communications.

For years MI6 has been recruiting officers from within the upper classes. This misplaced confidence in the loyalty of British gentlemen would prove disastrous when the KGB manage to persuade some of these elite few to spy for the Russians. In 1978, MI6 is dealt another blow when a Bulgarian dissident is assassinated in broad daylight by a poison pellet fired from an umbrella. The KGB is suspected but the killer isn’t caught.

Finally in the 1980s the tide turns and MI6 land their most important KGB double-agent of the Cold War. Oleg Gordievsky is working at the Soviet Embassy in London, but is secretly meeting MI6 officer John Scarlett to divulge Russian intelligence. Gordievsky recalls how close the world came to nuclear war in 1983 when the Soviets mistook a NATO exercise for a real attack.

The secret missions and the covert operations are all laid bare. We expose the cunning games of cat and mouse and the dangers and deceptions involved in a life of espionage. This is the reality of Her Majesty’s Secret Service.