凡是喜欢《海军罪案调查处》的朋友对《洛杉矶》其实并不陌生－－该剧的头两集（被命名为《传奇》）本季已经插在《海军罪案调查处》正剧中播出了。《洛杉矶》主要讲述了海军罪案调查处专门从事秘密监视任务的分支部门OSP（特别项目办公室，Office of Special Project）打击高科技犯罪、逮捕最危险的罪犯并维护国家安全的故事。
加入该小组的成员都是训练有素的精英特工，他们运用尖端科技手段和各种各样的假身份秘密开展工作。他们潜藏得很深，有时连家人也不知道他们的真实身份。为了完成任务，他们不顾个人安危，每天都游走于生与死的边缘。
代号G的Callen特工（Chris O'Donnell扮演）是条「变色龙」。为了打入犯罪组织内部，他可以把自己改变成任何「需要」的形象。他的搭挡Sam Hanna特工（LL COOL J扮演）是前海豹突击队成员，曾在阿富汗和伊拉克战场上接受最残酷的实战考验。Hanna还是个监视专家，善于使用各种尖端设备。当执行外勤任务的队友需要帮助的时候，他总是能在第一时间提供决定生死的重要情报。Callen和Hanna的直接上司是OSP办公室主任Lara Macy特工（Louise Lombard），她负责计划任务的制定、调配和监控，并负责在关键时刻作出关键决定。Kensi Lo特工（Daniela Ruah扮演）奉命协助OSP开展行动。她是一位前海军陆战队员的女儿，聪明绝顶，富有激情。临床心理学专家Nate Getz（Peter Cambor扮演）则相当于小组中的「智库」，他不仅能轻易攻破任何人的心理防线，而且拥有敏锐的观察力和一流的判断力，能在任务前、任务中、任务后的不同阶段快速判别嫌疑人的精神状态和心理状态。
在危机四伏的高端犯罪领域，OSP的成员唯有依靠彼此的帮助和过硬的罪案调查技巧，才能取得一个又一个胜利。
Endgame 8.5
播出日期: 2012-09-25
运行时间: 44 min
概述: Following Callen’s public shooting of the Chameleon, all is not well with the NCIS: LA team, as Callen is placed on suspension and Hetty adjusts to retired life.
The Recruit 8.3
播出日期: 2012-10-02
运行时间: 44 min
概述: A drone strike on a bomb-making compound in Afghanistan reveals the body of a recently retired Marine, leaving the NCIS: LA team to investigate why the Marine returned to Afghanistan and whether or not he betrayed the country he fought for.
The Fifth Man 8.7
播出日期: 2012-10-09
运行时间: 43 min
概述: The NCIS: LA team investigate a compromised intel operation after four people connected to the classified project are killed at a diner explosion. As Deeks and Kensi are on the trail of those involved, they learn that a wayward teenage girl might be related and Kensi can’t help but be empathetic to her situation.
Dead Body Politic 7.7
播出日期: 2012-10-23
运行时间: 43 min
概述: The NCIS: LA team investigates the tragic death of a U.S. senatorial candidate’s staffer who is run over crossing the street. The high-profile case becomes a matter of national security as the agents must determine whether it is an isolated tragic incident or a politically connected plot that might put others in danger.
Out of the Past (1) 8.0
播出日期: 2012-10-30
运行时间: 44 min
概述: When a CIA agent who worked with Sam Hanna over eight years ago seeks his help and is soon found dead of an apparent suicide, Hanna and Callen suspect foul play and a bigger conspiracy. Meanwhile, Deeks finds his inner “dog whisperer” with Kensi as the two go undercover and enter a dog show with a prized poodle.
Rude Awakenings (2) 8.0
播出日期: 2012-11-13
运行时间: 43 min
概述: The NCIS: LA team continues their investigation behind the death of a CIA agent that leads to a dangerous ring of Russian super agents. In a race against time, Hanna risks having a secret exposed.
Skin Deep 6.7
播出日期: 2012-11-20
运行时间: 43 min
概述: The NCIS: LA team heads to the beach to question the possible link between a surfer, an Internet video and a dead Naval tech scientist. Meanwhile, as Callen and Hanna investigate the victim’s intelligence connections, Deeks and Kensi go undercover to catch their suspects and some waves.
Collateral Damage 8.3
播出日期: 2012-11-27
运行时间: 43 min
概述: The NCIS: LA team questions the motive behind the murder of a retired CIA agent turned millionaire and in the process also questions what Hetty knows about the case.
The Gold Standard 8.3
播出日期: 2012-12-11
运行时间: 42 min
概述: The NCIS: Los Angeles team investigates the strange and brazen heist executed by gunmen in costumes that could directly impact the U.S. economy. Meanwhile, as Deeks testifies on a case, Granger insists on partnering up with a very reluctant Kensi.
Free Ride 8.0
播出日期: 2012-12-18
运行时间: 43 min
概述: Callen, Sam, Kensi and Deeks spend Christmas aboard an aircraft carrier investigating the death of a fellow NCIS special agent. Meanwhile, Nell and Eric make the most of the holidays back at headquarters and Hetty takes a trip.
Drive 6.7
播出日期: 2013-01-08
运行时间: 43 min
概述: A former defendant of Deeks is targeted for discovering information that could dismantle a lucrative car shipping operation with links to a global terrorist ring. Meanwhile, the NCIS: LA team tackles the large-scale stolen car operation from the inside when Kensi goes undercover in an auto body shop.
Paper Soldiers 6.7
播出日期: 2013-01-15
运行时间: 43 min
概述: A distraught widow is suspicious of the circumstances surrounding her Marine husband’s last battle and Sam and Callen help to determine if there has been a cover-up. Meanwhile, Hetty summons Operational Psychologist Nate Getz to be her “pawn” and the rest of the NCIS: LA sense another evaluation on the horizon.
The Chosen One 9.0
播出日期: 2013-01-29
运行时间: 44 min
概述: Callen goes undercover to infiltrate a network of Chechen terrorists who are recruiting foreign fighters to join their cause and planning their next attack in the U.S.
Kill House 8.3
播出日期: 2013-02-05
运行时间: 43 min
概述: Callen, Sam, Kensi and Deeks go undercover as an elite tactical force in order to investigate an ambush tied to a cartel kingpin with terrorist connections.
History 6.3
播出日期: 2013-02-19
运行时间: 43 min
概述: An NCIS: LA investigation leads the team to question a lone survivor of a former terrorist organization, while Kensi and Deeks follow the trail into the woods
Lohkay 6.7
播出日期: 2013-02-26
运行时间: 43 min
概述: Callen is concerned that Sam might be too invested after he takes on a missing persons case for an Afghani elder who helped him years ago when he was wounded on a mission.
Wanted 5.5
播出日期: 2013-03-05
运行时间: 43 min
概述: Sam fears for his family’s safety when his wife is called to resume a former CIA cover after a case suggests ties to the infamous Sidorov and his stolen nuke.
Red (1) 9.3
播出日期: 2013-03-19
运行时间: 43 min
概述: Callen and Sam fly to Idaho and join forces with NCIS: Red, a mobile team of agents who live together and investigate crimes in various locations, when a murder weapon found there matches one used in a national security case in Los Angeles.
Red (2) 9.3
播出日期: 2013-03-26
运行时间: 43 min
概述: While the LA team chases leads digitally and locally, the NCIS: Red team travels in their mobile trucks, nicknamed "Laverne and Shirley", in a race to track down a cunning terrorist before he disappears.
Purity 7.7
播出日期: 2013-04-09
运行时间: 44 min
概述: When cyanide in a communal water jug lethally poisons a lieutenant and leaves a Navy pilot in serious condition, the NCIS: LA team investigates whether this is an isolated incident or an early test for large-scale water contamination.
Resurrection 8.0
播出日期: 2013-04-23
运行时间: 43 min
概述: A body is stolen after a special task force successfully takes down an infamous cartel boss, leaving the NCIS: LA team to investigate the leak and track down the missing body.
Raven & the Swans 8.3
播出日期: 2013-04-30
运行时间: 42 min
概述: Callen questions Hetty’s motivations when a bizarre case involving a mysterious woman is revealed to be an undercover agent from her past.
Parley 7.0
播出日期: 2013-05-07
运行时间: 42 min
概述: Deeks goes undercover to obtain information about an infamous arms dealer looking to get back in the business, but the woman he befriends leads the operation in a dangerous directon. Meanwhile, Kensi confronts new emotions as she runs surveillance on Deeks and his female source.
Descent 6.2
播出日期: 2013-05-14
运行时间: 44 min
概述: A nuclear explosion in the Pacific reignites the search for stolen nuclear weapons and prompts Hetty to shuffle the NCIS: LA partnerships, sending Callen and Kensi overseas and leaving Sam and Deeks teamed up state side.
