ET Canada

Mark Harmon Looks Back On 15 ‘NCIS’ Seasons

“NCIS” star Mark Harmon celebrates the show’s 15th season at TV Guide's cover party, while opening up about new addition, Maria Bello, and long-time cast member Pauley Perrette leaving the show. Watch “NCIS” on Global Tuesdays at 8 p.m. ET/PT.

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