Two boys, playing in their quiet suburban neighborhood, respond to the sound of a nearby crash of a pickup truck, and they find the body of the dead driver with a gunshot wound; the victim is a Navy commander, so Gibbs and company investigate. A neighbor tells about a woman and an SUV, and the widow tells about an old friend of the vic from a previous duty station; Abby says that the killer is a careful professional. The gang pursue and find a suspect. EJ Barrett reappears from her hiatus after the resolution of the P2P killer; Tony and EJ bicker with each other. Abby provides a lead to the shooter, so Gibbs, McGee, and Ziva pursue it, and they find him. Gibbs speaks with the SecNav about the Phantom unit and the Watcher fleet, and Tony takes EJ to a safe house, then another man dies. Fireworks break out in a woods, then Gibbs, McGee, and Ziva find and catch the loose cannon. EJ goes to an even safer place, and Ziva receives a phone call.