NCIS

A discharged Navy Intelligence officer, suffering from post traumatic stress disorder, is the sole survivor of a deadly dispute being investigated by the team. Kensi connects with him personally.

A body containing a top-secret residue is stolen from the autopsy room, leading the team to discover an experimental Navy tracking system; Callen challenges Hetty on the rock wall.

The murder of a Marine provides new clues in the first case Pride and Lasalle ever worked together, just before Hurricane Katrina struck the city and washed away any evidence.