The series’ first season was originally planned to have thirteen episodes. On October 7, 2009, after rating as the most watched new show of the Fall 2009 U.S. television season, CBS ordered a full set of 22 episodes, which was extended to 24 episodes on November 4, 2009.In the series premiere, NCIS investigates the death of a Navy officer killed during an LAPD shootout with drug runners. Initially they think the officer was a hostage but when Special Agents G. Callen (Chris O’Donnell) and Sam Hanna (LL Cool J) find he has been picked up and dropped off daily by the drivers of the car and has been using his military clearance to send top secret satellite photos of a mounting anti-drug military mission to a drug cartel leader, they question his loyalty. Further investigation reveals that he was being forced to cooperate because his niece is being held hostage. When they learn the identity of the cartel leader, Callen and Sam go under cover posing as satellite experts, offering to replace the flow of secret information to him; their goal is to get close enough to find the dead Navy officer’s niece.NCIS: Los Angeles (Naval Criminal Investigative Service: Los Angeles) is an American television police series of the case which opened onCBS September 22, 2009.The series airs in the following NCIS Tuesdays.On January 14, 2010, the series was renewed for a second season on CBS.NCIS: Los Angeles is the first spin-off NCIS, which was a division of another CBS series, JAG.On October 7, 2009, CBS gave the show a van for the entire season, which extends the first season of 22 episodes. The season was extended again on November 4, 2009, when CBS announced its order for an additional period of two episodes.The program was known as NCIS: Legend while in production (in reference to the episode of NCIS where the spin-off was introduced), and the names deemed to be included NCIS: OSP (Office of Special Projects) and NCIS: Undercover. Shooting began in February 2009, with characters entering the two-part episode entitled NCIS “Legend”, the first part of which was filed on April 28, 2009. This episode served as a backdoor pilot for the series, in a manner similar to the introduction of NCIS, which was introduced by a two-part episode of JAG.