The second season begins with Lockhart and Gardner merging with a Washington, D.C., firm. In court, Alicia counsels a man on trial for murder who insists on serving as his own lawyer. The man claims a government conspiracy is behind the killing.
In military court, Alicia defends an Army reservist accused of murdering his wife after the man was found not guilty in regular court. Meanwhile, an Internet reporter tries to ruin Peter's campaign, and Diane tries to get Lou Dobbs dropped as a client.
Alicia tries to clear the name of an alleged sniper who died in prison and bring to justice the person responsible. Meanwhile, Alicia's gay brother (Dallas Roberts) visits and publicly claims that Peter is homophobic. The comments appear on the Internet and threaten to damage Peter's campaign.
Alicia becomes embroiled in an ethics scandal and risks being disbarred. Her trouble also threatens to fatally harm Peter's campaign. Meanwhile, a third candidate comes forward to run for state's attorney.
A massage therapist accuses a Nobel Peace Prize winner of sexual assault, but Alicia and the firm's partners aren't sure if they want to take the case. Meanwhile, Peter and Eli become concerned over a third candidate in the race for state attorney.
Alicia combats a disabled attorney (Michael J. Fox) who tries to use his disability to sway a jury during a class-action suit against a pharmaceutical company. Meanwhile, Kalinda confronts a former friend whom she suspects is giving Blake inside information on her.
Alicia defends a teen pop star (Miranda Cosgrove) charged with attempted murder after she allegedly ran her car into a rival's vehicle to purposely injure her. Meanwhile, Peter is shocked when the Democratic Committee asks him to drop out of the race for state's attorney.
Alicia tries to get a stay of execution for a death-row inmate after she receives a vague tip from a courthouse clerk who suggests an error was made in the case. Meanwhile, Peter prepares for his first debate in the state's attorney race.
A client's son is accused of murdering a pharmacist and Alicia is asked to turn the young man against his girlfriend, who is also accused of the crime. Meanwhile, Alicia's brother makes an unexpected visit after breaking up with his boyfriend, and Diane asks Alicia to join her at a new law firm.
Will and Alicia defend a man accused of murdering his father, but they fear their client isn't getting a fair trial because of the judge's biased attitude. Meanwhile, Kalinda discovers Blake is doing background checks on everyone at the firm and that he is now her supervisor, and Jackie becomes overly involved with Peter's campaign, much to Eli's dismay.
Alicia defends a prisoner who, under duress, confesses to murdering a fellow inmate. Meanwhile, Wendy Scott-Carr tries to force Peter out of the state's attorney race by threatening to expose a sensitive Florrick family issue.
A mole is detected in the firm when Alicia takes on a class-action lawsuit and tries to round up more signatures for the case than shrewd lawyer Louis Canning (Michael J. Fox), who uses a physical disability to his advantage to sway potential clients. Meanwhile, Derrick brings in a super PAC as a client.
Diane represents a young Internet billionaire who sues a film studio for allegedly defaming him in a movie. Meanwhile, Alicia confronts Will about the message he left on her voice mail months earlier. Rita Wilson and F. Murray Abraham guest star.
Diane defends ballistics expert Kurt McVeigh (Gary Cole), her sometimes lover, when he is sued for testimony he gave in a murder trial involving a cop killer who was recently exonerated. Meanwhile, Eli learns that Wendy, Peter's campaign rival, has an illegal nanny (America Ferrera).
The firm sues a social-networking site on behalf of a Chinese dissident for failing to protect his anonymity. The man posted an anonymous blog about democracy in China and was jailed when the site revealed his name. Meanwhile, Will and Diane try to wrestle control of the firm away from Derrick.
A convicted murderer (Sam Robards) is sued when he profits from the crime by writing a song that allegedly describes the killing. Meanwhile, Eli anonymously uses the firm to help a woman (America Ferrera) whose father is facing deportation after being arrested for a crime he didn't commit.
Alicia goes up against Louis Canning (Michael J. Fox) in court when she represents families of workers who committed suicide because of poor working conditions. Meanwhile, a reporter threatens to run a story accusing Peter of sleeping with a coworker and Eli tries to stop the article from going forward.
The firm tangles with a South American dictator when it represents a small drilling contractor in a dispute against a major oil company. Meanwhile, Alicia is pressured into giving a TV interview and the state's attorney election results come in.
The firm represents a patient in a liver-transplant case against rival attorney Patti Nyholm (Martha Plimpton), but when Patti is fired from her law firm she asks Lockhart/Gardner to defend her. Meanwhile, Alicia deals with Peter's one-night stand with Kalinda.
The firm defends an adultery-Web-site owner, the prime suspect in the murder of one of the site's users. Meanwhile, Alicia confronts Kalinda about her one-night stand with Peter, prompting Kalinda to consider leaving the firm.
The second season concludes with the firm defending a man accused of murdering a judge. Alicia and Kalinda temporarily put aside their strained relationship to work on the case. Meanwhile, Eli decides to bring his consulting business to Lockhart/Gardner, but Alicia is against the idea.