Illegal agent may refer to:
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Non-official cover
In espionage, operatives under non-official cover (NOC) are operatives without official ties to the government for which they work who assume covert roles in organizations.
This is in contrast to an operative with official cover, where they assum ...
, an espionage operative without official government links who assume covert roles
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Illegals Program
The Illegals Program (so named by the United States Department of Justice) was a network of Russian sleeper agents under non-official cover, unofficial cover. An investigation by the Federal Bureau of Investigation (FBI) culminated in the arres ...
, a specific group of Russian espionage operatives, arrested in the United States in 2010
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