A major player in the private-sector aerospace industry, Drewett, whose firm operates under contract to the US Department of Defense (DoD), dies inside a test chamber at his facility in Palmdale, California, near Los Angeles; Callen and company investigate, in part to determine the security of US military (DoD) technology. Eric goes undercover as an FAA inspector; G, Sam, Kensi, and Deeks, taking a more direct approach, meet Drewett's business partner, Holt, and Drewett's daughter, Ariel, who suspects murder and gives a name; Holt stalls, argues, and resists; Eric does nicely in his assignment but runs into a big problem. Later everyone in the field watches a big bang; the team find Holt's body, then they go to a flea market in Saugus, between Palmdale and Los Angeles, where they not only watch a transaction but also grab and detain all the participants in it. All the pieces fit together.
—DocRushing