The 3rd Choir (episode)

The 3rd Choir is the 4th episode of NCIS: Los Angeles Season 6 as well as the 124th episode of the entire NCIS: Los Angeles series.
==Synopsis==
The OSP team find themselves in great danger as the mole remains hidden inside OSP Headquarters with the OSP building itself turning into a fierce battleground when a figure from the team's past arrives to kill Hetty, forcing Callen, Sam, Kensi and Deeks into an intense battle while OSP Psychologist Nate Getz returns to help Nell recover from her traumatizing experience of her first in the line of duty killing.
==Plot==
==Major Events ==
* The OPs base is compromised for the first time.
==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.
Kensi Blye 	Daniela Ruah 	NCIS Special Agent 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.
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.
Owen Granger 	Miguel Ferrer 	NCIS Assistant Director.
Henrietta Lange	Linda Hunt 	Operations Manager with the Office of Special Projects.
Sam Hanna 	LL Cool J 	A former Navy SEAL-turned-NCIS Special Agent with the Office of Special Projects.
===Recurring Cast===
Name 	Portrayed by 	Role
Nate Getz 	Peter Cambor 	OSP's Operational Psychologist.
Matthias Draeger 	Jürgen Prochnow 	
Arkady Kolcheck 	Vyto Ruginis 	
Salazar 	Francis Capra 	
Matthew Ogilvie 	Eddie Shin 	
Ann Jones 	Marybeth Massett 	Congresswoman.
Michael Thomas (Inelegant Heart)	John Heard (actor)	Special Congressional Investigator.
Ava Wallace 	Aisha Hinds 	Chief Investigator for the Department of Justice.
===Guest Cast===
Name 	Portrayed by 	Role
Hollace Kilbride 	Gerald McRaney 	Retired Navy Admiral.
Marine (The 3rd Choir) 	Michael Buonomo 	
Salazar's Gangmember 1 	Steve "Troublesome" Castillo	
Ms. Simons 	Sahlima 	
Pedestrian (The 3rd Choir)	Diane Yery 	Uncredited role.
  v - [ e] - dNCIS: Los Angeles Season 6
♦ Deep Trouble Part 2 (episode) ♦ Inelegant Heart (episode) ♦ Praesidium (episode) ♦ The 3rd Choir (episode) ♦ Black Budget (episode) ♦ SEAL Hunter (episode) ♦ Leipei (episode) ♦ The Grey Man (episode) ♦ Traitor (episode) ♦ Reign Fall (episode) ♦ Humbug (episode) ♦ Spiral (episode) ♦ In the Line of Duty (episode) ♦ Black Wind (episode) ♦ Forest for the Trees (episode) ♦ Expiration Date (episode) ♦ Savoir Faire (episode) ♦ Fighting Shadows (episode) ♦ Blaze of Glory (episode) ♦ Rage (episode) ♦ Beacon (episode) ♦ Field of Fire (episode) ♦ Kolcheck, A. (episode) ♦ Chernoff, K. (episode)
Category:NCIS: Los Angeles Episodes
Category:NCIS: Los Angeles Season 6 Episodes
Category:NCIS: Los Angeles Episodes written by Dana Scanlon
Category:NCIS: Los Angeles Episodes written by R. Scott Gemmill
Category:NCIS: Los Angeles Episodes directed by Diana C. Valentine
Category:NCIS: Los Angeles Episodes featuring Nate Getz
Category:NCIS: Los Angeles Episodes featuring Matthias Draeger
Category:NCIS: Los Angeles Episodes featuring Arkady Kolcheck
Category:NCIS: Los Angeles Episodes featuring Salazar
Category:NCIS: Los Angeles Episodes featuring Matthew Ogilvie
Category:NCIS: Los Angeles Episodes featuring Ann Jones
Category:NCIS: Los Angeles Episodes featuring Michael Thomas
Category:NCIS: Los Angeles Episodes featuring Ava Wallace
Category:NCIS: Los Angeles Episodes featuring Hollace Kilbride