SLEEPERS TECHNOLOGY IN THE HOME Benign Friend or Malevolent Intruder?” A sleeper agent is a spy who is placed in a target country or organization not to undertake an immediate mission but to act as a potential asset if activated. …….. This common use in fiction is directly related to and results from repeated instances of real-life ” sleeper agents” participating in spying, espionage, sedition, treason, and assassinations. In this