Watch NCIS: Los Angeles Season 4 Episode 21 online via TV Fanatic with over 5 options to watch the NCIS: Los Angeles S4E21 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, and Google Play.
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When a cartel boss' body goes missing, Kenzi and Deeks head down to Mexico to investigate while Callen and Sam try to figure out if there's a leak in the DEA on NCIS: Los Angeles.