This is episode 3 in a special 4 part series.
In 'A Spy in Exile - Defying Double Death' former British agent Martin McGartland talks about the day that changed his life forever.
Kidnapped by the IRA and awaiting execution, the unmasked MI5 spy manages to escape torture and death. But that day wasn't to be his worst.
Despite starting a top secret life under the protection of the British security services away from Northern Ireland, he goes on to miracously survive IRA assassination yet again.
Here, he describes how his disdain and anger isn't directed at the terror gang that tried to kill him twice, but for his so-called protectors.
During the Northern Ireland Troubles, Martin McGartland was one of MI5's most priceless assets. Born into a staunchly republican family in the IRA heartland of west Belfast in the 1970s, the British spy, codenamed Agent Carol, went on to infiltrate one of the most feared and ruthless terror gangs in the world. He stopped shootings, bombings and murders but his fearless undercover activities came at a price. Now living in exile under a secret identity, McGartland gives his most in depth and explosive interview to date. And he reveals how MI5 ended up treating him worse than the IRA who tried to murder him.