After Marcel Janvier's arrest, Naseem Vaziri's Iranian agents want at all cost Atley's undercover agents list, which contains the name of a CIA-recruited traitor. So they try to capture NCIS agents, which succeeds in Calan's case, so he's mildly tortured. Hetty is saved by Hanna, despite her resignation.
A US drone fails to kill Taliban leader Adanan Al-Ahmadi, but among the innocent civilian victims is USMC Afghanistan veteran Adams, whose family and former boss believed he took a job in Orgeon to pay for college. He took a trace-confusing series of flights ending in Dhubai, as recruit of a shady West coast security firm. At least eight of their recruits are missing, so Calan impersonates John Harris to find out where they went, which proves quite dangerous.
Dr. Oliver Mathers runs an 'informal' terrorism prediction program at the Naval Intelligence agency, rivaling George Toretto's officially sanctioned one in the Pentagon. Four of his five geniuses test persons, made to believe they're just gaming, have been murdered. While the team discovers that the fifth, Mike Hoffman, is actually a dumb petty criminal whose identity was used by his elusive alleged daughter Astrid, more blood is spilled.
Californian US Senator Dick Osborne's unconventional challenger Monica Tenez's campaign fund-raising collaborator Clay Everhurst is killed in a deliberate crash. While the boys mainly trace the assailant via his car and grill smug Osborne, Kensi joins the campaign staff undercover to examine rivalries and financial malversation. The killer now turns sharpshooter, yet missed Tenez.