‘NCIS’ Stars React to David McCallum’s Death: Mark Harmon & More

Will Mark Harmon Return to ‘NCIS’? Actor Can’t Make Up His Mind Amid New WWII Book

NCIS alum Mark Harmon co-authors book about real-life NCIS operation during Pearl Harbor

Mark Harmon Writes Book Based On How Real NCIS Agency Came To Be; Will Debut In November