NCIS Los Angeles “Purity” (4×20 – Apr 9th) Sneak Peek #3

Cool J and O’ Donnell Come To Blows
With one Navy lieutenant dead, a pilot in serious condition and enough cyanide to wipe out the city of LA, the team is on the case as they try to figure out whether the poisoning of the two naval officers is an isolated incident or a calculated plan to poison LA’s drinking water.