Watch NCIS: Los Angeles S03E21
Touch of Death
The joint NCIS: Los Angeles and Hawaii Five-0 task force travel from Hawaii to Los Angeles, when the lead suspect in the case moves to the mainland with a deadly virus in tow. Series crossover part 1 is Hawaii Five-0 (2010) S02E21.. You can watch NCIS: Los Angeles S03E21 here.
Air date: May 01, 2012 on CBS at 9:00 PM
Watch NCIS: Los Angeles S03E21 online
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Watch NCIS: Los Angeles S03E22 - Neighborhood Watch
Season 3 Episode 22
Air date: May 08, 2012 on CBS