Purity (S04E20)
S04E20
After cyanide is discovered in a shared water jug, a lieutenant tragically dies while a Navy pilot is left in critical condition. The NCIS: LA team steps in to determine if this incident is a one-off event or a precursor to a more extensive plan for widespread water contamination.
Show
If Only
Episode
S04E20
Air Date
Apr 09, 2013
Season 4 Episodes
S04E01
Endgame
S04E02
Recruit
S04E03
The Fifth Man
S04E04
Dead Body Politic
S04E05
Out of the Past (1)
S04E06
Rude Awakenings (2)
S04E07
Skin Deep
S04E08
Collateral
S04E09
The Gold Standard
S04E10
Free Ride
S04E11
Drive
S04E12
Paper Soldiers
S04E13
The Chosen One
S04E14
Kill House
S04E15
History
S04E16
Lohkay
S04E17
Wanted
S04E18
Red (1)
S04E19
Red (2)
S04E20
Purity
S04E21
Resurrection
S04E22
Raven & the Swans
S04E23
Parley
S04E24
Descent