Listen in to a debate on the paradox of espionage's role during the Cold War years, as featured on the weekly CNN program "Postscript" -- which accompanies the COLD WAR series.

CNN World Affairs Correspondent Ralph Begleiter, Russian historian Vladislav Zubok, retired U.S. Lt. Gen. William Odom and American scholar Thomas Blanton consider the fear and mistrust, as well as the stability, brought on by spying.

Odom is director of the National Security Studies for the Hudson Institute. He was director of the National Security Agency from 1985 to 1988, and in that capacity was an adviser to the U.S. Joint Chiefs of Staff, secretary of defense and director of Central Intelligence.

Zubok is one of the leading historians of the Soviet side of the Cold War and the author of "Inside the Kremlin's Cold War." He has studied extensively in Soviet and American archives and has taught classes on the Cold War at Amherst College, Ohio University in Athens and Stamford University. In 1993, Zubok was employed by the Kennan Institute for Advanced Russian Studies in Washington, D.C., and since then has worked at the Norwegian Nobel Institute in Oslo and is now a fellow at the National Security Archive in Washington.

Blanton is executive director for the National Security Archive in Washington, D.C. The archive is a non-governmental research institute providing information from U.S. government and official archives for scholars, journalists, members of Congress, lobbyists and others. Their research teases out documents still classified to give a complete picture of what really happened.