The NCIS team must determine if the murder of a Navy commander's wife is linked to her profession as a therapist or an act of terrorism after finding the commander's name on a Jihadist target list. Meanwhile, the team discusses Halloween costumes and Tony's recent dating habits.

After the body of a Marine Lieutenant is found hidden under an 18-wheeler, the NCIS team tracks the vehicle’s previous locations to pinpoint the crime scene and suspect. Also, Sloane encourages the team to sit down and talk about Ziva’s recent reappearance.