Agent in contact with two opposing intelligence services, only one of which is aware of the double contact or quasi-intelligence services.
-- Also, a person pretending to work as a spy for one government while actually working as [an asset] for another government.
-- Also, an agent who is cooperating with an intelligence service of one government on behalf of and under the control of an intelligence or security service of another government, and is manipulated by one to the detriment of the other.
-- Also, an agent working for two opposing agencies; he is loyal to one while betraying the other.
-- Also, a person who engages in clandestine activity for two intelligence or security services (or more in joint operations), who provides information about one or about each to the other, and who wittingly withholds significant information from one on the instructions of the other or is unwittingly manipulated by one so that significant facts are withheld from the adversary.