At North Korean spy school, the woman lecturing began "In 2003 I penetrated the United States. This was one of my targets." A slide projector shows a picture of a young, white, American man. "An experimental physicist developing a new rocket fuel. Fortunately, my sources indicated his intelligence was proportionate to his romantic ineptitude. I maneuvered for a chance meeting in a grocery store. It failed as he left too early. So, the next day I trailed him to a coffee shop and got in line behind him. I led with discussing the weather and I flirted my way to his apartment and intimate contact was progressing according to schedule.
However, the target was protected." The next slide showed a different young, white, American man. This one wore a white t-shirt that featured Superman's "S" insignia. Bizarrely, he wore a green long sleeve shirt under the t-shirt. "Although this man is an internet verifiable genius, he accepted a covert FBI roommate assignment to guard against infiltration. He used a cover persona of an anal-retentive and barged into the bedroom of the man he was protecting claiming 'The roommate agreement section 8 subsection C paragraph 4' required 12-hour notice must be given before coitus. The target tried to point out he hadn't known me for 12 hours. But reason is pointless against such a man. Pretending to be indignant, I got out of there before he could gather any more information about me."
A new slide appeared, of young adults playing soccer. "This is an example of a layered defense." She used her pointer. "The team in blue uniforms has just gotten the ball in their own backfield and must penetrate their opponent's forwards, midfielders, defenders and goalie to score. Layered defense is also common in military settings.
At the time I was unaware of the FBI's defensive layers. Expect unlikely obstacles at any point in your mission."
A new slide appeared, an attractive blonde woman in a waitress uniform. "Oh, and the FBI eventually hardened the target by finally finding a patriotic woman of the requisite physical characteristics willing to marry a nerd just to keep her country's secrets safe."
The End
A/N-despite some inconsistency in the episodes I am going with the version portrayed in 3x22 "The Staircase Implementation."