The feud between Pauley Perrette and Mark Harmon on the set of NCIS resulted in them being separated during filming. The conflict stemmed from Harmon repeatedly bringing his dog to set, which caused discomfort among the cast and crew, particularly after the dog bit a crew member. As a staunch animal advocate, Perrette raised safety concerns with Harmon about the presence of the dog on set. As tensions escalated, they were no longer allowed to film scenes together, with scripts deliberately written to keep them apart.
There have been rumors linking Perrette’s departure from NCIS to this feud. Despite the challenges behind the scenes, NCIS remained a successful show throughout its 20 seasons.