Amidst Halloween festivities in New Orleans, a Naval Staff Judge Advocate dressed in a costume is found dead in a cemetery; the team debates Halloween costumes and activities.
The team investigate the murder of a Navy Officer assigned as a tech liaison with a private developer; Pride turns the carport into an auto shop.
A Navy therapist who is working to get justice for victims of sexual assault is murdered; Carter's mother confronts him when he refuses to talk to the FBI for a background check on her behalf.
Sebastian's high school friend asks for help when her business partner is killed at a gaming convention; FBI Special Agent Raymond Isler believes Adrian is the hacker that the Cyber Crimes division has been tracking for years.