In celebration of the imminent Halloween, "" employs a story revolving around the festivity. In "Code of Conduct", the NCIS team discover that a Marine known for his practical joke is found dead on the Halloween Eve. They think that the victim's pranks may contribute to ghoulish retribution. Also, Ziva tries to adjust to her new role on the team.
Unlike the original series, "" will not pick up a ghostly storyline. Instead, the episode called "Killshot" follows the investigation of a United States citizen of North Korean descent murder. The secrets to classified software are thought to be lost until NCIS uncovers a suspect from Director Vance's past. Through the promo, it is revealed that aka Abby in "NCIS" will make a cameo.