Ben learns the hard way, some valuable lessons about the importance of following established procedure and protocol, Lydia's current murder investigation takes an unexpected turn, and Nate and Sammy are unprepared when a group of people they encounter turns into a violent mob.
Danny and Baez investigate a local bombing but meet with tension and resistance from the community during the investigation. Frank must deal with the political fallout when a man punches an officer who was allegedly too aggressive in his questioning.
Lydia and Rene are called to Compton to investigate the murder of a young SULA student, only to discover that the girl was not exactly who her parents claimed she was. Meanwhile, John takes Ben with him to Indian Wells to attend the funeral of his friend, a cop who committed suicide. On the way back, they stop at the rehab center to check in on Dewey.
After meeting with federal agents in a dark edge of Chinatown, Jamie witnesses a crime in progress and his suspect is killed while in pursuit. Now, Danny must solve the case in order for Jamie to avoid an Internal Affairs investigation.
Neighbors of the Reagans are murdered and their son becomes the prime suspect. Jamie is convinced he's being pursued by the Blue Templar when his gun goes missing.
The detectives try to link the suicide of an Argentine immigrant to her husband who has a history of violence. While the subsequent investigation is not successful, they discover his hatred might be linked to a string of unsolved murders with the same MO.
The daughter of narcissistic psychotherapists takes desperate measures to exact her revenge for years of their abuse and neglect, leading to tragedy for a young man caught in the web of her parents' promiscuity, mind games and competitiveness.
Logan and Barek investigate after secret service agent Paula Kendall is found dead in her home. Suspicion initially turns to the husband after detectives realize that it took him eleven minutes after a first failed attempt to get in touch with 911, and their investigation leads them to her husband's role in a proposed Indian casino. Logan and Barek are especially interested when it turns out that the 'witness' Paula was supposed to be meeting that night had ties to a local politician, Peter Bellingham, who also had ties to Kendall's husband.
Sebastian gets a taste of his own medicine and is stunned to discover that someone is usurping his cause, initiating a chain reaction that could cause the downfall all of those involved. Dan and Steph deal with the fallout of Becca's arrest, while Michael goes to extreme measures to ensure that Kevin is not implicated as being complicit in the beating of Taylor, and Chris makes a decision about his future at Marshall.
After Aidan Grant, an employee for a local computer company, is found dead, Goren and Eames investigate, initially believing that Grant was murdered because of a business deal gone wrong involving biometrics, lip-reading, the company Ubicool and the military, but their investigations lead them to a young man named Robbie who worked in the office opposite Ubicool. Goren soon realises that Robbie isn't fully in control of his actions and suspects his therapist, Dr. Pynchon, of wrong-doing, but Carver wants them to get the answers from Robbie no matter what they need to do.
When a young woman is shot at an appointment she never should have been at, Goren and Eames investigate her death and learn she had received a kidney transplant a few years earlier. Initially they believe that Vanessa Nikos may have been killed so that her organs could be harvested, but soon learn that her death was more closely connected with the organ she initially received from living donor Boyce Wainwright. When her shooter, also awaiting an organ transplant, is also found dead, the police realise they're on to something.
Goren and Eames are frustrated when the law has no provision for the arrest of a man whose abusive control of his family and neglect of his severely depressed wife led her to several murder-suicide attempts which he did nothing to prevent, and eventually resulted in the deaths of three of his sons.
Captain Ross, Goren and Eames have their Thanksgiving plans interrupted when the deputy commissioner's daughter, a US soldier home from Iraq, goes missing. At the same time, Goren has difficulty coping with the failing health of his needy mother.
It's open season in New York when not one but two powerful judges are executed. At first they seem to have no connection; one was a family court judge whose entire family was attacked, the other is an appellate court judge. After investigating the judges more thoroughly, Goren and Eames realise that their first set of suspects was simply a smokescreen, and there is a far more insidious threat. Their investigation leads them to a non-custodial father who has a beef with the court system.
Terrorism is initially suspected after the body of a young Arabic diver washes up on the shore, but Goren and Eames soon learn that the victim was part of a trio of con artists that were working as salvagers for a wealthy local man.
When Goren and Eames search for a jewel thief who murdered her accomplice, they discover that the clever larcenies are the brainchild of her lover, Nicole Wallace, Goren's long-standing nemesis. As the detectives delve into the personal and working relationships between the two women, they uncover a plot to cause the death of Wallace's ex-husband, the only person who can lead them to evidence of the very first murder Wallace committed.
"Betrayed" is the best rated episode written by Diana Son. It scored 9/10 based on 2 votes. It was directed by N/A. It aired on 6/22/2008 and is rated 0.0 points higher than their second-best episode, "Code 4".