盾牌是一部近年少见的极具争议性的连续剧，它打破了传统警匪片套路，把一群警官与各种罪案做斗争的同时，也面临各种自身问题的困扰，一个个有着复杂性格的警察跃然于屏幕之上，彻底打破了“警察就是好人”这种简单而幼稚的界定...
本片获得2003年度第60届金球奖中2个奖项——
*最佳電視劇情類影集（Best Television Series – Drama）
*最佳電視劇情類影集男主角（Best Performance By An Actor In A Television Series – Drama）：麥克奇力【盾牌】（Michael Chiklis，The Shield）
上一季完结时，Vic已经已经到了绝境的边缘；由于Shane需要亚美尼亚黑帮的帮助，全盘脱出了他们抢劫黑帮运钞车的内幕，使得Vic的家人遭到亚美尼亚黑帮追杀；自己也面临的最终委员会的审查，职位不保。却发现了最后一颗救命稻草，墨西哥黑帮势力的入侵使得Vic和Aceveda再次走到一起，并意外获得了一箱子墨西哥黑帮控制的公司Pezuela收集的法明顿地区高级干部的内幕。
新的一季中，Vic与墨西哥黑帮Pezuela公司是主要的焦点；还有如何处理和shane的关系，亚美尼亚黑帮仍然没有得到解决；Vic重新回归警队，还会有那几个队员？不知老冤家Forest Whitaker扮演的检察官是否这季会回归？Dutch与Danielle会好上吗？等等各种矛盾纠结。
The show made history by becoming the first ad-supported cable series to win the 2003 Golden Globe Award for Best Drama Series. In its first season, Shawn Ryan (Writing) and Clark Johnson (Directing) received Emmy nominations, which were also firsts for basic cable in those categories. The Shield has received two TCA nominations for Outstanding Achievement in Drama. As of March 2005, the show has become the longest running series on the FX Network.
参见：
www.tv.com
Now the Montecito has been sold to inexperienced young widow-heiress Monica Mancuso, who had it thoroughly renovated, Ed who stayed on as general manager is worried about the top-secret reopening, especially after two recent hold-ups in Indian casinos, but Monica refuses any delay so he can work in new staff. Most old key personnel has left. Danny now heads his late dad's contracting company McCoy Construction, but accepts to return as Ed's right hand, and rehires Mike -who was parking valet- and Sam, whose clients were deserting her, only Ed's daughter refuses. The boys soon find proof the construction crews have been infiltrated as there are at least two officially dead men and computer chips have been planted to cause a blackout one minute after the grand reopening starts, far more sophisticated then in either Indian casino heist.
Picking up from where the last season left off, security realizes that a gun was fired in Ed's suite, as Danny and Ed's daughter realize they have deeper feelings for each other than either of them wanted to admit. Samantha realizes what trouble she's in when one of her high roller clients rolls into the hotel's beach front resort in Hawaii and rolls up a half a million dollar bill and threatens to leave it in her lap, along with the dead stripper in his room.
Las Vegas PD detective Max Dillon first arrests Danny, who learns DElinda is pregnant, of killing still missing Mary's dad, alone or with her, until Mitch and Mike prove there must be another suspect. Sam survives her kidnapping by dumping Vince Peterson in flight. Her disloyal attempt to recruit whales as investors fro the Montecito is fruitless, and late since gloomy cowboy Cooper already paid the tax arrear.
Ed is framed for murder when enemies from his past resurface. Danny and Mike secretly intervene to investigate and take matters into their own hands. Meanwhile, Sam, Nessa, Mary and Delinda desperately attempt to find tenants for their new joint-purchased home, settling on what they think to be the perfect tenants, only to discover they've misjudged the situation.
