Meg gets married in Russia but returns home after discovering she was used for a green card marriage. Meanwhile, Chris, in need of an extracurricular activity, joins Principal Shepherd in shooting pornos at the high school.
When four people, including a CIA officer, are shot and killed in broad daylight, the NCIS team suspects the attacks have something to do with DRONA. Also, Pembrook meets with Callen and gives more insight into his past.
When Red is identified as a possible hostage during a deli robbery in Philadelphia, Dembe and Ressler take action. Back in D.C., Senator Panabaker evaluates the task force's dealings with Red while Siya digs deeper into her mother's past.