Kim Philby was a British diplomat who betrayed his country and the member nations of the North Atlantic Treaty Organization (NATO) by providing the Soviet Union with a wealth of information that only a high-ranking insider like himself would possess....

Stunned by the revelation that a British scientist was passing American nuclear secrets to the Soviets immediately after World War II, diplomats feared the scandal could result in Britain's exclusion from U.S. atomic weapons programs, documents released Friday revealed.Newly declassified papers from Britain's National Archives...

"Don't get lost in the wilderness of mirrors," Kim Philby, the English archmole, warns his CIA colleague in TNT's "The Company," a six-hour, three-part docudrama about the CIA, the KGB and the Cold War.The phrase defines the deceptions and treachery of espionage, but viewers wanting...

I just got off the phone with a legendary spy. Well, let me amend that: a legendary counterspy. Legendary at least to those who have followed the twists and turns of one of the great unresolved spy mysteries of the past century, one of the...

I know that my recent near-arrest in front of C.I.A. headquarters will not go down as one of the landmark events in the history of espionage. Certainly it pales into insignificance next to recent developments: the warrantless N.S.A. surveillance, George Tenet’s W.M.D. “slam dunk.” But...