NCIS: Los Angeles
, one of the most anticipated new dramas
of the fall, premieres Tuesday (9/8c, CBS), and every member of the production knows the show has something to prove.
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"My biggest concern, and I think [for] most of us, is to please the current NCIS
fans first and foremost, because there's... a huge following," says the show's star, Chris O'Donnell
. "If new people tune into