Mark Harmon and 'NCIS' Cast Celebrate TV Guide Magazine Cover and 15 Seasons on Television (PHOTOS)

Erin S. Medley

NCIS star Mark Harmon was joined by his co-stars and friends at the River Rock at Sportsmen’s Lodge in Studio City, California, on Monday, November 6, 2017, to celebrate the show's 15 seasons on television and the actor's TV Guide Magazine cover. To catch Harmon's exclusive interview with TV Guide Magazine, pick up the Nov. 13-26 double issue on newsstands Nov. 9.

NCIS, Tuesdays, 8/7c, CBS