A double agent is a spy secretly working for both sides. Run a double agent, turn him into a double agent.
Only one side knows the truth, which is what makes the position so valuable and so dangerous. A double agent can be fed false information deliberately, which is half the point of keeping one.
1noundouble agentA spy who is secretly working for both sides.
“He worked as a double agent for eleven years before anybody suspected.”
double agent is a spy.
Practised in Spying & Secrecy