Producers of NCIS are reflecting on Pauley Perrette's exit from the show, providing candid explanations for her departure. Perrette, who played Abby Sciuto, had been with the franchise since its inception, but the incident involving a dog belonging to Mark Harmon led to her decision to leave. Perrette's character, Abby, made her final appearance in season 15, and although there have been discussions about mentioning her character, her return to the show is now unlikely due to her strained relationship with Harmon.