Purity is the 20th episode of NCIS: Los Angeles Season 4 as well as the 92nd episode of the entire NCIS: Los Angeles series.
Synopsis
OSP investigate when two Naval officers die from from cyanide poisoning after drinking water from the same jug with the team wondering if the incident was isolated or a test for something much more deadlier.
Plot
Callen after having taken some cyanide.
Cast
Series Regulars
| Name | Portrayed by | Role |
|---|---|---|
| G. Callen | Chris O'Donnell | NCIS Special Agent and the leader of the Office of Special Projects field team. |
| Sam Hanna | LL Cool J | A former Navy SEAL-turned-NCIS Special Agent with the Office of Special Projects. |
| Henrietta Lange | Linda Hunt | Operations Manager with the Office of Special Projects. |
| Marty Deeks | Eric Christian Olsen | A Detective with the Los Angeles Police Department and also the LAPD/NCIS liaison. |
| Kensi Blye | Daniela Ruah | NCIS Special Agent with the Office of Special Projects. |
| Eric Beale | Barrett Foa | Tech Operator with the Office of Special Projects. |
| Nell Jones | Renée Felice Smith | Tech Analyst for the Office of Special Projects. |
Recurring Cast
| Name | Portrayed by | Role |
|---|---|---|
| ZNN Reporter (Paper Soldiers) | Kent Schocknek | Reporter. |
Other Cast
| Name | Portrayed by | Role |
|---|---|---|
| Lawrence De Vries | Tom Gallop | |
| Dominic Fryman | Chris Bruno | Alex Fryman's father. |
| Alex Fryman | Owen Teague | Dominic Fryman's son. |
| Randall Baker | Jay Ellis | Flight Officer in the United States Navy. |
| Joshua Gordon | Jade Carter | Lieutenant in the United States Navy. |
| Crawford | Travis Aaron Wade | Chief Petty Officer in the United States Navy. |
| Zaki Faheem | Omar Elba | |
| Cam | Steven W. Bailey | |
| Lopez | Mark Damon Espinoza | Detective with the Los Angeles Police Department. |
| Ashley Hong | Lily Mariye | |
| Roger Morgan | Steve Tom | |
| Eugene | Rance Howard | |
| Alessandra | Bree Condon |
