This documentary follows ex-spy Alexander Litvinenko from his forced exile from Russia, to his death from poisoning in November of 2006.
Execution is Postponed
The spy game is a serious business, and throughout history, the tools and technologies developed for it have mattered as much as the spies themselves.
The big names behind the big stories. Laura Kuenssberg talks to those making the news, inside and outside politics.
How Vladimir Putin has used his experience as a spy to create and lead modern Russia: arrogance, anger and betrayal; military interventions, cyber-attacks and political assassinations.