Adam Key

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

NCIS helps a former NCIS tech operator search for her missing ex-partner, when they fear he might be working with the gun runners they failed to take down years ago. Also, Callen reveals to Sam that he's about to put down roots with Anna, and Deeks reels when his bar gets a negative review.

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 years ago. While Eric is desperate to keep Kensi safe, he finds himself forced to leave NCIS.

As Nell keeps Callen in the dark about the team's search for Katya, Callen manages to track down the person tailing him to a remote location that is teeming with Russians.