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VALENCIA, CA - JANUARY 03: (L-R) Actors Brian Dietzen, David McCallum, Pauley Perrette, Mark Harmon, Sean Murray (backrow)Cote de Pablo and Michael Weatherly pose at CBS' 'NCIS' celebration of their 200th episode on January 3, 2012 in Valencia, California. (Photo by Mark Davis/Getty Images)

VALENCIA, CA - JANUARY 03:  (L-R) Actors Brian Dietzen, David McCallum, Pauley Perrette, Mark Harmon, Sean Murray (backrow)Cote de Pablo and Michael Weatherly pose at CBS' 'NCIS' celebration of their 200th episode on January 3, 2012 in Valencia, California.  (Photo by Mark Davis/Getty Images)