The tension between Mark Harmon and Pauley Perrette wasn’t just a rumor—it was a real conflict that altered the future of NCIS. For years, they worked side by side as Gibbs and Abby, forming one of the most beloved dynamics on the show. But things changed in 2016 after an incident involving Harmon’s dog on set, which reportedly left a crew member injured. According to insiders, Perrette raised concerns about safety, and that’s when the relationship between the two stars began to fracture.

Sources say the environment became tense, with Perrette allegedly refusing to be on set with Harmon during her final season. Scenes between Abby and Gibbs had to be filmed separately or avoided altogether, a heartbreaking shift for longtime fans. Perrette later posted cryptic tweets suggesting deeper issues, including claims that she “was silenced” and “feared harm,” though she never directly named Harmon.

CBS responded by stating that Perrette had come to them with concerns and they took them seriously. While Harmon never publicly addressed the feud in detail, his silence only fueled speculation. The fallout not only led to Perrette’s emotional exit but also marked the end of one of the most iconic friendships in TV crime drama history.