The NCIS team undergoes mandatory psych evaluations while investigating the death of a naval commander.

Gibbs and the NCIS team have to find answers regarding Tony's months-long assignment when an NCIS agent is found dead.

Gibbs clashes with Dr. Samantha Ryan (guest star Jamie Lee Curtis) over the truth behind a navy reservist's possible suicide

In an effort to find the terrorist Parsa, Gibbs and the NCIS team track down one of his cohorts using evidence from the drone attack. Meanwhile, an emotionally shaken McGee struggles with the ramifications of the incident.