The 3rd Choir is the fourth episode in season six of NCIS: Los Angeles.
The team finds itself in danger as the mole remains inside of the agency. As Nate returns to help Nell deal with the aftermath of her first kill, the OSP center itself turns into a battle ground when an enemy from the team's past arrives to kill Hetty.
|Chris O'Donnell||G. Callen||Special Agent in Charge|
|LL Cool J||Sam Hanna||Senior Special Agent|
|Linda Hunt||Henrietta Lange||Operations Manager|
|Daniela Ruah||Kensi Blye||Junior Special Agent|
|Barrett Foa||Eric Beale||Tech Operator|
|Eric Christian Olsen||Marty Deeks||LAPD Liaison|
|Renée Felice Smith||Nell Jones||Intelligence Analyst, NCIS: OSP|