Mark Harmon's Sister Confirmed What We Thought All Along

Mark Harmon's decadeslong career has captivated audiences, but behind the scenes, whispers of tension and controversy have long surrounded the NCIS star. And now, a surprising source has confirmed our suspicions: his own sister, Kristin Nelson. In this video, we'll delve into the shocking truth about Mark's onset antics, controversial behavior, and the Harmon family dynamics that will leave you speechless.