: The "release group" name, a well-known entity in the TV scene.
: Callen goes undercover by attending a DNA rally, where he stages a fight with Sam to gain the group's trust. NCIS Los Angeles S04E20 HDTV x264-LOL[ettv]
: Callen’s cover is blown, and he is nearly killed by cyanide himself, only surviving by using a counteragent. The team eventually locates the group's base and prevents the mass poisoning. Technical File Details : The "release group" name, a well-known entity
: Indicates the file was distributed or indexed by the ETTV community. Cast & Credits G. Callen Chris O'Donnell Sam Hanna Kensi Blye Daniela Ruah Marty Deeks Eric Christian Olsen Hetty Lange Linda Hunt Director Eric Laneuville Writer NCIS: Los Angeles Season 4 Episode 20 Recap: Purity The team eventually locates the group's base and
: The team discovers the incident was a "trial run" by a radical protest group called "Designing a New America" (DNA). The group plans to release cyanide into the city's water supply to make a political statement.