Wiktionary
n. 1 A spy who pretends to be a double agent for one side, while he or she is truthfully a double agent for the other side. 2 A spy who works for three opposing sides, such that each side thinks the spy works for them alone.
Wikipedia
Triple Agent is a French dramatic/thriller film, directed by Éric Rohmer in 2004. It runs for 115 minutes.
Usage examples of "triple agent".
I wonder if he could have been a double agent or the supreme devil of all intelligence services, a triple agent?
Which meant, of course, that they could never be sure he wasn't a triple agent, but that was par for the course.
I wonder if he could have been a double agent-or the supreme devil of all intelligence services, a triple agent?
He always liked complexity, and being a triple agent's the most complex role of all.
Whether a double or a triple agent, he'd have been in contact with the KGB.
That he, Commander Ashley, had been asked to become a double agent and could now become -- if the term is proper -- a triple agent?
The Stasi concluded that Bollier was a triple agent, probably working for the CIA as well, since he seemed to easily be able to get very special American equipment for them.
I said to Swartwout, drawing on my superior knowledge of the double -- no, triple agent.