Tristen MacDonald

A patient's desire to end her life triggers haunting memories for Hunt; Arizona and Callie have different opinions about the future; Richard tries to adjust to his new role.

After an ambush changes the course of their investigation, the NCIS team has to quickly find answers, and one team member has flashbacks back to their very first NCIS assignment.

Callen poses as a patient in a mental health facility to locate a missing NSA agent who vanished while following an ISIS cell.

An attack on a graduate student working on a new electromagnetic weapon for the navy is linked to international warfare; Kensi struggles with physical therapy for her spinal injury.

Callen must interrogate his father after he is found in a patient's hospital room during a radiation poisoning case; members of the team discuss their plans for Thanksgiving.

Mac forms a bond with a student who is found wandering the streets covered in blood and wielding an axe.