Getting Silly on the 'NCIS' Set

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What's a day on the NCIS set without a lot of shenanigans? Our own Nancy O'Dell visits Mark Harmon and the entire cast of the hit CBS show and discovers that a basic set visit can be a lot more complicated than it needs to be.
From Mark Harmon's pranks to his incessant staring while Nancy attempts to shoot a promo, watch the fun video!
Don't miss the all-new season of NCIS, airing Tuesday nights on CBS.