Name: Episode 20 — Purity
Released: 2013-04-09
Duration: 44 min
Rating: 7.7
Cast: Chris O'Donnell, Daniela Ruah, Eric Christian Olsen, Barrett Foa, Medalion Rahimi

NCIS: Los Angeles (2009 – 2023)

2009 • 14 seasons • Adventure, Comedy • TV-14

On August 9, 2026

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39.5 Attention Score

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Episode 20 — Purity

Released: 2013-04-09 • Adventure/Comedy

77%

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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.

Where to Stream Episode 20

Season 4 · Episode 20 · Streaming in USA

Information

Creator	Shane Brennan
Episode air date	09.04.2013
Episode runtime	44 min
Episode rating	7.70
Genres	Adventure / Comedy
TMDB series rating	7.5
IMDb series rating	6.8
Series status	Ended
Age rating	14+
Country	US

NCIS: Los Angeles (2009 – 2023)

Episode 20 — Purity

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