NCIS: Los Angeles season 12

The twelfth season of NCIS: Los Angeles, an American police procedural drama television series, began airing on CBS on November 8, 2020, and ended on May 23, 2021. The season included 18 episodes. This is the final season to feature Barrett Foa and Renée Felice Smith as series regulars.

Main

 * Chris O'Donnell as Grisha "G." Callen, NCIS Supervisory Special Agent (SSA) and Special Agent-in-Charge (SAC) of the Team
 * LL Cool J as Sam Hanna, NCIS Senior Field Agent, Second in Command
 * Daniela Ruah as Kensi Blye, NCIS Special Agent
 * Eric Christian Olsen as Marty Deeks, NCIS Investigator (Previously LAPD/NCIS Liaison Officer)
 * Barrett Foa as Eric Beale, NCIS Senior Technical Operator
 * Renée Felice Smith as Nell Jones, NCIS Special Agent and Intelligence Analyst & Acting Operations Manager
 * Medalion Rahimi as Fatima Namazi, NCIS Special Agent
 * Caleb Castille as Devin Roundtree, NCIS Special Agent (Previously FBI Agent)
 * Linda Hunt as Henrietta Lange, NCIS Supervisory Special Agent (SSA) and Operations Manager

Recurring

 * Bar Paly as Anastasia "Anna" Kolcheck, former ATF Agent, Callen's girlfriend
 * Vyto Ruginis as Arkady Kolcheck
 * Ravil Isyanov as Anatoli Kirkin
 * Gerald McRaney as Hollace Kilbride, Retired Navy Admiral
 * Elizabeth Bogush as Joelle Taylor, CIA Agent
 * Nicki Micheaux as Effie Carlson, Special Agent

Guest Stars

 * Marina Khan
 * Mariela Garriga as Pietra Rey (episode 8)

Development and filming
On May 6, 2020, CBS renewed the series for a twelfth season, which premiered on November 8, 2020. Production for the twelfth season began on September 23, 2020 with full safety protocols in place amid the COVID-19 pandemic.

Casting
Caleb Castille was promoted to series regular after recurring in season eleven.