The fifteenth season of the American police procedural drama NCIS premiered on September 26, 2017, in the same time slot as in the previous seasons, Tuesdays at 8 PM. The season premiere was watched by 17.42 million viewers, picking up two months after Gibbs and McGee were last seen fighting a group of rebels in Paraguay and focused on the aftermath of those events. The season concluded on May 22, 2018 and contained 24 episodes.
Showrunners Frank Cardea and George Schenck (in their first full season at the helm) wanted to focus Season 15 around a \"good mystery and more stand-alone episodes than two or three-parters.\" However, they noted that they wouldn't shy away from multi-part episodes if the story was deemed worth it. This season included a three-episode arc revolving around serial killer Gabriel Hicks, the episodes being: \"Burden of Proof\", \"Keep Your Friends Close\", and \"Keep Your Enemies Closer\".
As to Quinn's departure, Special Agent Torres (Wilmer Valderrama) stated in 15:1 (\"House Divided\") that Quinn is now on leave taking care of her mother; this coincides with a running story-arc her character had maintained for some time. The specific turnover point between Quinn & Sloane's characters occurs at the end of 15:4, when Bello's character premieres. In another central casting announcement, TV Line reported on October 4, 2017, that founding NCIS actress Pauley Perrette would be leaving the role of \"Abby Sciuto\" after the conclusion of season fifteen. Perrette's final episode was episode 22, which aired on May 8, 2018. Also, in this episode, Duane Henry (Clayton Reeves) was written off the show. 59ce067264