Purity
Run Time: 45 mins
Air Date: Tue, 9 Apr 2013
Average Rating: ⭐ 7.7 (3 votes)
CBSSeason 4 - Episode 20
Average Rating: ⭐ 7.7 (3)
When cyanide in a communal water jug lethally poisons a lieutenant and leaves a Navy pilot in serious condition, the NCIS: LA team investigates whether this is an isolated incident or an early test for large-scale water contamination.