Tristen MacDonald

Morgan agrees to show Ava around the LAPD, but things quickly take a dangerous turn when the precinct is held hostage by the friends of a recently convicted man.

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 the their investigation, the NCIS team has to quickly find answers, and one team member flashes back to their very first NCIS assignment.

Callen goes undercover at a hospital to find an NSA agent who vanished while tracking an ISIS cell.

An attack on a graduate student developing a weapon for the Navy is tied to international warfare.

Callen must interrogate his father after he is found in a patient's hospital room during a case.