Callen and Sam return for a 12th season of assignments, as the Naval Criminal Investigative Service encounter more and more threats. Chris O'Donnell and LL Cool J star.
When a Marine gunnery sergeant is shot down while walking the street at night, Cullen and the team uncover links to the man's younger brother. S1, Ep18/24
S1 E187 Mar 9:00pm
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