Harold Adrian Russell "Kim" Philby was a British intelligence officer and a spy for the Soviet Union. In 1963, he was revealed to be a member of the Cambridge Five, a spy ring which had divulged British secrets to the Soviets during World War II and in the early stages of the Cold War. Of the five, Philby is believed to have been the most successful in providing secret information to the Soviets.
Aldrich Hazen Ames is an American former CIA counterintelligence officer who was convicted of espionage on behalf of the Soviet Union and Russia in 1994. He is serving a life sentence, without the possibility of parole, in the Federal Correctional Institution in Terre Haute, Indiana. Ames was known to have compromised more highly classified CIA assets than any other officer until Robert Hanssen, who was arrested seven years later in 2001.
Richard Sorge was a German journalist and Soviet military intelligence officer who was active before and during World War II and worked undercover as a German journalist in both Nazi Germany and the Empire of Japan. His codename was "Ramsay" (Рамза́й).
The Cambridge Five was a ring of spies in the United Kingdom that passed information to the Soviet Union during the Second World War and the Cold War and was active from the 1930s until at least the early 1950s. None of the known members were ever prosecuted for spying. The number and membership of the ring emerged slowly, from the 1950s onwards.
John Cairncross was a British civil servant who became an intelligence officer and spy during the Second World War. As a Soviet double agent, he passed to the Soviet Union the raw Tunny decryptions that influenced the Battle of Kursk. He was alleged to be the fifth member of the Cambridge Five. He was also notable as a translator, literary scholar and writer of non-fiction.
Oleg Antonovich Gordievsky, CMG is a former colonel of the KGB who became KGB resident-designate (rezident) and bureau chief in London.
Isidor Feinstein Stone was an American investigative journalist, writer, and author.
Oleg Vladimirovich Penkovsky, codenamed Hero and Yoga was a Soviet military intelligence (GRU) colonel during the late 1950s and early 1960s. Penkovsky informed the United States and the United Kingdom about Soviet military secrets, including the appearance and footprint of Soviet intermediate-range ballistic missile installations and the weakness of the Soviet intercontinental ballistic missile (ICBM) program. This information was decisive in allowing the US to recognize that the Soviets were placing missiles in Cuba before most of them were operational. It also gave US President John F. Kennedy, during the Cuban Missile Crisis that followed, valuable information about Soviet weakness that allowed him to face down Soviet leader Nikita Khrushchev and resolve the crisis without a nuclear war.
Oleg Danilovich Kalugin is a former KGB general. He was during a time, head of KGB political operations in the United States and later a critic of the agency. After being convicted of spying for the West in absentia during a trial in Moscow, he remained in the US and was sworn in as a citizen on 4 August 2003.
Sir Roger Henry Hollis was a British intelligence officer who served with MI5 from 1938 to 1965. He was Director General of MI5 from 1956 to 1965.
Yuri Ivanovich Modin was the KGB controller for the "Cambridge Five" from 1948 to 1951, during which Donald Duart Maclean was said to have passed atomic secrets to the Soviets. In 1951, Modin arranged the defections of Maclean and Guy Burgess. Modin's predecessors in control of the damaging Cambridge spy ring were executed during Stalin's Great Purge.
Maurice Hyman Halperin (1906–1995) was an American writer, professor, diplomat, and accused Soviet spy.
Agent of influence is a controversial term used to describe people who are said to use their position to influence public opinion in one country or decision making to produce results beneficial to another.
Michael John Bettaney, also known as Michael Malkin, was a British intelligence officer who worked in the counter-espionage branch of the Security Service often known as MI5.
Clayton J. Lonetree is a former U.S. Marine who was court-martialed and convicted of espionage for the Soviet KGB; he served nine years in prison for espionage. During the early 1980s, Lonetree was a Marine Corps Security Guard stationed at the Embassy of the United States in Moscow.
A resident spy in the world of espionage is an agent operating within a foreign country for extended periods of time. A base of operations within a foreign country with which a resident spy may liaise is known as a "station" in English and a rezidentura in Russian. What the U.S. would call a "station chief", the head spy, is known as a rezident in Russian.
Benedict Richard Pierce Macintyre is a British author, reviewer and columnist for The Times newspaper. His columns range from current affairs to historical controversies.
Gunvor Galtung Haavik was a Norwegian employee of the Norwegian Ministry of Foreign Affairs and suspected spy.
Arnold Deutsch (1903–1942?), variously described as Austrian, Czech or Hungarian, was an academic who worked in London as a Soviet spy, best known for having recruited Kim Philby. Much of his life remains unknown or disputed.
Sexpionage is the involvement of sexual activity, intimacy, romance, or seduction to conduct espionage. Sex, or the possibility of sex, can function as a distraction, incentive, cover story, or unintended part of any intelligence operation.
