In July 1997, 46-year-old Jim Nicholson was admitted to the Federal Correctional Institution in Sheridan. Although he was locked up, Jim’s desire to work with the Russians was far from over.

One of the most important figures in World War II wasn’t a military commander or a powerful statesman: he was a mathematician.

In 1994, 43-year-old Jim Nicholson was a bona fide U.S. intelligence star. But a series of challenges in Jim’s personal life led him to sell top-secret U.S. intelligence secrets to the Russian spy service, the Service of the Russian Federation. His betray

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While on assignment in America, he secured information that could have stopped Pearl Harbor—but his efforts were thwarted by the FBI’s politics of suspicion. As Duško Popov returned to Europe and his Nazi spymasters, he had to work harder than ever before

He was recruited by both Germany’s Abwehr and Britain’s MI6, cementing himself as one of World War II’s foremost double-agents. Promptly after Duško Popov started his life as a spy, he was given information that could have stopped Pearl Harbor.

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After the success of their atomic mission in 1945, Morris and Lona Cohen’s work was far from over and the USSR wanted more intel. The FBI, meanwhile, wanted them behind bars...

Born in 1909, Henri Dericourt went from quiet beginnings in a small hamlet northeast of Paris, to working his way to the center of one of the most consequential clandestine operations in WW2.

In 1945, American activists Morris and Lona Cohen provided the Soviet Union with a complete diagram and description of the atomic bomb, expediting the development of Russia’s own A-bomb and giving them a substantial advantage during the Cold War.