Noel Field (January 23, 1904 – September 12, 1970) was an American spy for the NKVD, whose activities before and after World War II allowed the Eastern Bloc to use his name as a prosecuting rationale during the 1949 Rajk show trial in Hungary, as well as the 1952 Slánský show trial in Czechoslovakia.
While employed at the U.S.
Department of State in the 1930s, Field acted as a Soviet spy.
During World War II, he worked in France and Switzerland to support Jewish communist and anti-fascist refugees.
During this time, he also had contacts with the U.S.
intelligence service OSS.
Arrested in Prague in 1949 by the Czechoslovak secret police and handed over to the Hungarian secret police and subsequently imprisoned in Hungary, he served as the pretext for show trials of communist functionaries in Czechoslovakia, East Germany, and Hungary, where it was claimed that he had served as their American spymaster.
The purpose of the show trials was to replace indigenous Communist Party members with others more aligned with Moscow.
After his release in 1954, he stayed in Budapest and remained a convinced communist.