NCIS: Los Angeles season 4

The fourth season of NCIS: Los Angeles an American police procedural drama television series originally aired on CBS from September 25, 2012, to May 14, 2013. The season was produced by Shane Brennan Productions and CBS Television Studios, with Shane Brennan as showrunner and executive producer. The episodes, "Red" and "Red-2" were intended to be a backdoor pilot for a purposed series titled NCIS: Red associated with the NCIS franchise. However, NCIS: Red was not picked up to series by CBS on May 15, 2013.

Main

 * Chris O'Donnell as G. Callen, NCIS Supervisory Special Agent (SSA) of the Office of Special Projects (O.S.P.) in Los Angeles
 * Daniela Ruah as Kensi Blye, NCIS Junior Field Agent
 * Eric Christian Olsen as Marty Deeks, L.A.P.D.Detective And Liaison To NCIS
 * Barrett Foa as Eric Beale, NCIS Technical Operator
 * Renée Felice Smith as Nell Jones, NCIS Field Agent and Intelligence Analyst
 * Linda Hunt as Henrietta Lange, NCIS Supervisory Special Agent(SSA) and Operations Manager
 * LL Cool J as Sam Hanna, NCIS Senior Agent, second in command

Recurring

 * Kathleen Rose Perkins as Rose Schwartz, coroner in Los Angeles
 * Vyto Ruginis as Arkady Kolcheck
 * Peter Cambor as Nate Getz, NCIS Special Agent
 * Miguel Ferrer as Owen Granger, NCIS Assistant Director
 * Erik Palladino as Vostanik Sabatino
 * Aunjanue Ellis as Michelle Hanna, "Quinn", Sam's wife
 * Christopher Lambert as Marcel Janvier
 * Timothy V. Murphy as Isaak Sidorov
 * Ravil Isyanov as Anatoli Kirkin
 * Alon Abutbul as Naseem Vaziri

Guests

 * Kim Raver as Paris Sumerskill, NCIS Special Agent In Charge (SAC) Of the Red Team
 * John Corbett as Roy Haines, NCIS Senior Agent and second in command
 * Scott Grimes as Dave Flynn, NCIS Forensic Agent
 * Gillian Alexy as Clare Keates, NCIS Special Agent
 * Edwin Hodge as Kai Ashe, NCIS Tech Expert attached to Red Team

Development
NCIS: Los Angeles was renewed for a fourth season on March 14, 2012. In November 2012, NCIS: Los Angeles was introduced in an upcoming spin-off titled NCIS: Red. Written and produced by Shane Brennan, the series would follow "a mobile team of agents who live and work together as they go across the country to solve crimes". The pilot episodes, titled "Red" and "Red-2", which aired on March 19 and March 26, 2013, during the fourth season of the series. On May 15, 2013, it was announced that NCIS: Red would not be picked up to series by CBS.

Broadcast
Season four of NCIS: Los Angeles premiered on September 25, 2012.