They operated without armour, without acknowledgment, and without any guarantee of survival. The men and women who reshaped the intelligence landscape of the Cold War did so not from the safety of offices or think tanks, but from within the very systems they were betraying — living double lives measured not in years but in the distance between one clandestine meeting and the next. The cost was not abstract. Adolf Tolkachev, a Soviet aviation engineer who passed thousands of pages of cutting-edge radar and avionics specifications to the CIA across nearly a decade, was arrested in 1985 after being betrayed — almost certainly by Aldrich Ames — and subsequently executed. General Dmitri Polyakov, codenamed TOPHAT, spent over two decades feeding the FBI and CIA intelligence that included missile specifications, Soviet military doctrine, and tangible evidence of the emerging Sino-Soviet rift — intelligence that shaped Richard Nixon's historic opening to China — before he too was exposed and shot. These were not men who spied for money. They spied because they had concluded, at enormous personal cost, that what they served had become something they could no longer protect.