Watch NCIS: Los Angeles Season 4 Episode 20 online via TV Fanatic with over 6 options to watch the NCIS: Los Angeles S4E20 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, and USA.

Episode Details

The team must figure out if cyanide put in a water jug is an isolated incident or a test for a much larger attack on NCIS: Los Angeles.

Rating: 4.9 / 5.0 (332 Votes)
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