The team helps a former NCIS tech operator search for her missing ex-partner, whom they fear might be working with the gun runners they failed to take down years ago;…

While NCIS investigates the disappearance of a department of defense officer who was looking into a recent UFO sighting, Anna makes a bold decision about her future.

After Callen receives a cryptic message from Hetty, he tracks down the person tailing him, bringing him to a remote location teeming with Russians… and face to face with Anna.

In order to get intel on a matter of national security, Kensi must come face-to-face with a sociopath who has been obsessed with her since she put him in jail…