Operation Relentless : The Hunt for the Richest, Deadliest Criminal in History

Russian billionaire Viktor Bout was the world's foremost arms dealer. Known as the 'Merchant of Death' he was both "Public Enemy No. 1" to the global intelligence agencies who hunted him and a ruthless criminal worth a fortune. He was also a former KGB officer and a tool of the Kremlin.

For decades Bout had eluded capture, building up a labyrinthine network of airlines rushing weapons to dictators, rebels, despots and terror groups worldwide. An enemy of the free nations of the world and a top global sanctions buster, Bout was hunted by MI6, INTERPOL, the CIA, the NSA and more. Holed up in Moscow - from where he masterminded the sale of anything from AK47s to state-of-the-art helicopter gunships and anti-aircraft missiles - he was shielded by a Russian state that was a partner in his dark dealings. In short, Bout appeared utterly invulnerable and beyond hope of capture.

Step forward former SAS man Mike Snow, AKA 'The Bear'. After serving in the world's most famous special forces unit, Snow had worked as a bush pilot in war-torn Africa, where he'd got to know Bout well. Via a secretive, shadow network, Snow was approached by the US Drugs Enforcement Agency. The DEA agents had one question for him: was Snow able to get Bout - the Lord of War?