Crosetti and Lewis investigate the shooting of a fellow police officer whom Crosetti regards as a son, Howard suspects a rabid Spiro Agnew fan of murder but ends up solving the Calpurnia Church case meanwhile Bolander makes a friend whose death interrupts his date with Dr. Blythe.

The fire investigation continues. Bayliss' back is acting up and Kellerman is paired with Pembleton. Kellerman shows Gee something, so he is offered a transfer into the department that he first rejects. Kay takes the sergeant's exam, Munch misses it due a ""comedy of errors.""

While Pembleton is still interested in the housekeeper's ex-boyfriend, Ballard still thinks that the Wilson family needs to be looked at more closely. Also, a body is found at Camden Yards during a game between the Orioles and the A's. Falsone questions Stivers about the Mahoney shooting and that begins to make her nervous. Tensions mount because there appears to be a leak to the press within the unit about the Wilson case. Orioles' security wants the case quickly resolved. Munch and Kellerman have only 48,000 possible suspects. The victim is discovered to be a dead Yankees fan. Tim gets his old high school French teacher to help them check out the whereabouts of the housekeeper's ex-boyfriend. He is cleared because of his current incarceration in a Haitian prison, which leaves the Wilson men as more probable suspects. Are Gee and Pembleton protecting Felix Wilson because he is a prominent businessman in predominately black Baltimore, as outsider Ballard suggests? Munch and Kellerman g

Two Vietnamese teenagers witness the shooting of their parents and some friends. One of the friends was a cop and one of the shooters they say was another cop. That cop they discover failed her psyche evaluation but may have possibly gotten her job due to Affirmative Action; although strings pulled by her father proved to be her ticket into law enforcement. After they are able to implicate the cop in the shooting, as a bonus they discover the body of her string-pulling father. Ballard suffers from an allergic reaction to crabs. Falsone finds out that the case against Georgia Rae Mahoney is going to be dropped because of a lack of evidence. He suspects that the whole Mahoney thing is going to blow up in the department's face, because he knows the Mahoney shooting didn't go down the way Stivers, Kellerman and Lewis reported it. Kellerman debates with Cox about what he should do about the Mahoney situation.

A slightly intoxicated man (driving with his wife) aggressively whips his car around a state-owned truck; the offended truck driver rams their car; their aggression results in a collision where both drivers die. The man's wife is in serious condition. Kellerman and Munch investigate this case. Falsone gets prepared for the final hearing in his bid for custody of his son. Meanwhile, the other detectives investigate the death of a man who made a mobile phone call from the coffin in which he had been buried alive. The coffin was buried in the parade ground of an old spy school. The victim might have remained alive if the lid hadn't been sabotaged to collapse. In the car / truck collision case, Cox's boss wants her to ""verify"" the results of the car driver's blood alcohol level to help protect the state from serious litigation. An old Russian friend of Gee's furnishes them with information that leads the detectives to the discovery of a group of men who couldn't make it as spies. (They cal

Bayliss returns to duty to discover the bosses have renovated the squad room in an attempt to make everyone forget the tragedy of last May. Gharty and Ballard have also returned and Ballard debates about whether she should ask Falsone to the Lodge party. New detective, Rene Sheppard, tells her just to go for it. Seizing the opportunity, Lewis goes for it and asks Sheppard to the party; it seems that he and Barbara have separated and are on their way to divorce. Meanwhile, Falsone speculates if he should ask Sheppard to the party. The first case Bayliss catches, now partnered with Munch, involves the dismembered body of Angelo Faltislo, a friend of Gee's cousin, Mario Giardello. Stivers and Falsone's case is similar: Leo Grimaldi, another friend of Mario, is also found dead. When Gee goes to question cousin Mario, he finds Mario's body in the same condition as that of his friends. Gee's estranged son, Mike Giardello, an FBI agent in Arizona, returns for the funeral. Mike asks Falsone (w