Agent with science in his sights.

Vladimir Ippolitovich Vetrov
The Soviet Union was top on espionage, but less so in science and technology. Thus the KGB sent Vladimir Ippolitovich Vetrov first to France and then to Canada to steal scientific and technological secrets. But he changed sides and in 1981 handed o French friend 4,000 secret documents and the names of 250 Soviet agents.
In August 1984, sent to serve a sentence for Irkutsk, Vetrov was transferred to the Lefortovo prison in Moscow and was accused of treason in the form of espionage. On December 14, the Military Collegium of the USSR Supreme Court sentenced Vetrov to death. On February 23, 1985 the verdict was carried out.
Bio:
Born 10 October 1932 in Moscow, USSR
1959 Joined the KGB
1965 – 1970 KGB operative in France
1974 – 1975 KGB operative in Canada
1975 Returned to KGB headquarters in Moscow
1981 Turned over the “Farewell Dossier” containing intelligence documents to the French
1982 Sentenced to 12 years in a Soviet penal camp for killing a man while drunk.
While in detention he confessed to being a double agent and is sentenced to death
Executed on 23 January 1985
THE Perfect SPY:

Dmitri Poljakow
Dmitri Fyodorovich Poljakow was a highly decorated Sowiet war hero and a lieutenant general of the GRU, the military intelligence service of the Red Army.
For 25 years he remained the CIA with such valuable details that U.S. intelligence insiders called him “our crown jewel”, the perfect spy.
In 1980, for health reasons, retired. After retiring, General Polyakov began to work as a freelancer in the GRU personnel department, gaining access to the personal files of all employees. On repeated proposals to move to the United States, Polyakov responded with a refusal: "Do not wait for me. I will never come to the USA. I'm not doing it for you. I do this for my country. I was born Russian and I die Russian."
Polyakov was executed in the Soviet Union in 1988.
Bio:Born 6 July 1921 in Starobilsk, now eastern Ukraine
1939 Enrolled in an artillery school, then served in World War II
1945 Joined the GRU (Soviet military intelligence service)
1951 – 1956 Stationed in New York as a member of the Soviet U.N. delegation
1961 In contact with the FBI
1965 – 1980 Military attaché in Rangoon, Burma (now Myanmar) and New Delhi (India)
1980 Retirement
1986 Arrested on the basis of information from Aldrich Ames and Robert Hanssen
1987 Sentenced to death by the supreme military tribunal of the Soviet Union
Executed on 15 March 1988
Many colleagues on his conscience:

Aldrich Ames
The soviet intelligence service arrested and executed beginning in 1985 one American spy after another. For a long time the CIA was at loss about this alarming phenomenon.
Then, in 1994, a leak in its own ranks was discovered. The traitor turned out to be Aldrich Ames, a Soviet affairs specialist and, at one point, head of the CIA’s anti – Soviet counter intelligence branch.
The international scandal caused by the "Ames affair" led to tensions in public relations between Russia and the United States. February 26, 1994 by the decision of US President Bill Clinton persona non grata was declared legal resident of the Russian SVR in Washington, Alexander Lysenko. On February 28, Russian President Boris Yeltsin was forced to do likewise with a resident of the CIA in Moscow, James Morris.
Bio:Born: 16 May 1941 in River Falls, Wisconsin, U.S.A.
1962 Joined the CIA
1969 Handler of CIA agents in Turkey
1981 Based in Mexico City
1983 Returned to CIA headquarters, Soviet, Eastern Europe section
1985 In contact with Soviet embassy officials
1986 Transfer to Rome to investigate the alarming losses of CIA agents in Eastern Europe
1993 Under FBI observation
1994 Sentenced to life in prison
No war of aggression planned, Maj. Popov said

Pyotr Semyonovich Popov
“Is the Soviet Union planning a war of aggression, and if so by what means?” In the 1950s this was the paramount question in world affairs plaguing the West. Pyotr Semyonovich Popov had the answer.
A major in the Soviet military intelligence service (GRU), he was stationed in Vienna. As of 1953 he also worked for the CIA.
He provided the Americans with detailed information about the organizational structure and staff of GRU centers, and on the arms development of the Soviet military. No war of aggression was planned, he assured his U.S. handlers.
Bio:Born in July 1923 in Kostroma, USSR
1942 Served in World War II
1949 – 1955 Soviet military intelligence (GRU) officer in Viena
1953 Contacted CIA staff in Vienna
1955 After a period in Moscow, GRU assignment in Schwerin, East Germany
1957 Transferred to Berlin
1958 Return to Moscow
1959 Arrest
1960 Trial and death sentence
Executed in June 1960
A double agent catering to the Soviet fears

Oleg Antonovich Gordievsky
Oleg Antonovich Gordievsky is believe to be the highest – ranking defector on the Cold War era.
In the early 1980s the political leadership in Moscow lived in dread of a nuclear preemptive strike by NATO. This enormous fear was unfounded in the eyes of Oleg Gordievsky.
He was the KGB’s deputy station chief in London, but as of 1974 worked as a double agent for M16, the British foreign intelligence service.
He delivered to Moscow, as desired, frequently absurd indications of a potential first western strike while informing the British of Moscow’s assessment of the situation and the resulting fear of a nuclear war. Neither side lost its cool.
Bio:Born 10 October 1938 in Moscow
1962 Joined the KGB, the Soviet secret intelligence service
1966 Posted to the Soviet embassy in Copenhagen under the cover of press attaché
1974 Recruited as a double agent by M16 the British foreign intelligent service
1982 KGB deputy station chief in London
May 1985 Returned to Moscow and interrogation by the counter intelligence (possibly following revelations by Aldrich Ames)
July 1985 Escape from Moscow
Now living in England
And let the Cold War begin

Igor Sergeyevich Gouzenko
Igor Sergeyevich Gouzenko has been credited with giving the start signal for the Cold War. He was a cipher clerk in the military attache’s section of the Soviet embassy in Ottawa, Canada. His bureau’s major assignment since 1943 had been to spy on an Allied nuclear weapons project in Canada.
In 1945 he switched sides and handed the Canadians 109 secret documents revealing, among other things, the presence of a wide net of Soviet sleeper agents in North America.
As a result, 22 Soviet agents were uncovered, including British – born nuclear physicist Allan Nunn May. Gouzenko’s disclosures resulted in the abrupt cooling of East – West relations.
Bio:Born 13 January 1918 in Rahachow, now Belarus, Russia
1941 Service in the Red army’s intelligence branch
1943 Cipher clerk at the Soviet embassy in Ottawa, Canada
1945 Contacted a Canadian newspaper, then the Canadian police
1945 – 1982 Withdrew from state affairs, lived as an author with his family in Canada
Died 15 June 1982 in Mississauga, Canada
Russia’s Sexiest Spy

Anna Vasil'yevna Chapman
Ana is the youngest and most glamorous of Russia's 10 self-confessed spies, media personality, and model who gained notoriety after being arrested in the United States as part of the Illegals Program spy ring. Her father, Vasily Kushchenko, was a senior KGB official.
At the time of her arrest she was accused of espionage on behalf of the Russian Federation's external intelligence agency, the SVR (Sluzhba Vneshney Razvedki) Chapman pleaded guilty to a charge of conspiracy to act as an agent of a foreign government.
On April 3, 2012, the deputy director of the FBI Counterespionage, Frank Filjutsi, stated that the espionage ring "was already so close to one of the members of the presidential administration that we could not wait any longer." According to him, Chapman tried to seduce one of the approximate Barack Obama and "crept in" closer to ever higher officials. "She got close enough to start bothering us";
Bio:Was born in 23 February 1982 in Volgograd, Russian SFSR, Soviet Union;
2001 married Alex Chapman and got British passport;
2004 earned a master's degree in economics with first class honours from Moscow University;
2004 moved to London;
2006 got divorced ;
from 2007 to 2008 she worked as a vice-president in the management company KIT Fortis Investments;
2009 moved to New to promote his US project to find rental housing NYCrentals.com;
2010 was deported to Russia as part of a prisoner exchange between the United States and Russia;
From October 22, 2015 to the present, she leads the pseudoscientific program "Mysteries of Chapman".
Now working and living in Russia.
Double agent

Yuri Ivanovich Nosenko
Nosenko contacted the CIA in Geneva, when he accompanied a diplomatic mission to that city in 1962. Nosenko offered his services for a small amount of money. He pretended being the ex KGB spy and he also had exaggerated his rank to make himself attractive to the CIA. Nosenko claimed that he could provide important negative information about the assassination of President John F. Kennedy, affirming that he had personally handled a review of the case of Lee Harvey Oswald, who had lived in the Soviet Union prior to the assassination. Interrogators from the CIA's Soviet Union division suspected that Nosenko was a KGB plant. He was interrogated for 1,277 days and had three polygraph tests. First two failed and passed only third one. After the last one he told that during first two he was tortured and tests results are wrong.
Nosenko was seized by CIA officers in Washington and from 1964 to 1967 was held in solitary confinement in a CIA safe house in Clinton, Maryland. When the interrogations led to no substantial results the interrogators were changed, and after a new team was brought on, Nosenko was cleared of all suspicions and released with pay. On March 1, 1969 Nosenko was formally acknowledged to be a genuine defector, and released, with financial compensation from the CIA. Until his death, Nosenko lived in the US under an assumed name.
Bio:Born in October 30, 1927 in Nikolaev, Ukrainian SSR;
1950 Graduated the Moscow State Institute of International Relations (MGIMO);
1953 Entered the KGB;
1962 entered CIA;
1964 CIA started interrogation;
1969 acknowledged to be a genuine defector and released;
2008 died.