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.
| Title | Purity |
|---|---|
| Genres | Action & Adventure Drama Crime Mystery |
| Release Date | 2013-04-09 |
| Episode Runtime | 00 Hours 45 Minutes |
| Season Number | 4 |
| Episode Number | 20 |
| Production Companies | Shane Brennan Productions, Belisarius Productions, CBS Studios |
