World War 1 activity -- Thompson and Farnsworth incidents -- Man called Intrepid -- Germany secretly prepares -- German covert Operations prior to WWII -- Western reaction to the threat before war -- Espionage in the Postwar years -- Pearl Harbor attack -- Counterintelligence in North Africa and Italy -- Cases from Europe -- Cases from Asia -- Case of Operation Pretorius -- Case from Southwest Pacific Area -- Case from the Cold War Era -- Case of Agent 58 -- Case of Yuri Nosenko KGB -- Case of Nguem-Van Sam -- Summary of Soviet Espionage in the United States -- Case of Line X -- Case of Whittaker Chambers and Alger Hiss -- Case of the Atomic Spy Ring in the USA -- Case of Morris and Lona Cohen (Kroger) -- Case of Nosenko vs. Golitsyn -- Case of the Portland Spy Ring -- Case of the Colonel Trofimoff -- Case of the Clyde Lee Conrad -- Case of the Walker Spy Ring -- Case of the Korean Tunnel -- Case of Robert Phillip Hanssen.