Greg needs to lose weight, Andy's baby is sick again, Bobby plans to propose to Diane, the new PAA arrives and a body in a trunk is moved from the 13th precinct into the 15th's jurisdiction. Andy is shot at while chasing a perp, he's not hit, but he stops the chase and the suspect gets away. Andy worries about the baby's health, getting shot Sylvia's return to work and the uncertainty of the future. Bobby pops the question, but Diane is hesitant to give him an answer. Greg worries about his weight as James expresses his interest in the new PAA for Anti-Crime. The new PAA for our squad adjusts Andy's collar for him. I think James needs to worry about his weight! Bobby inherits a building and Henry, the son of the deceased woman, is a little upset.

Greg and Andy start the weight bet. Bobby and Andy help out Morrisey on his investigation in the case of a missing baby; he suspects the father. James campaigns to become the elected delegate for the squad. Bobby strikes a deal with Henry, son of the woman whose building he inherited. Greg starts working out. The baby is found. Bobby and Diane make a decision about the current direction of their relationship. Later, a girl that Bobby talked with outside his building is killed in manner described the previous by Henry.

An ex-con that put away year ago, meets him on the street and tells him about a prisoner who's been serving time for a crime he didn't commit. James wins the election by three votes, much to Gotelli's dismay. Savino stops by and gives Bobby the status on the murder in his building and asks that he talk with Henry. Fancy's root canal and other dental work make him a little edgy. Andy and Bobby do some investigating and decide to reopen the case. That angers the retired detective that closed the case five years ago. James doesn't like the way Cohen interrupts his conversation with Gina. Bobby makes some of his own inquiries in the murder in his building, but he's afraid he might be stepping on Savino's toes. Especially when after talking with Henry, he finds out something that might lead to the actual killer. Bobby and Diane discuss their relationship, but still don't come to any conclusions. The diet contest continues; Medavoy has lost 1 more pound than Andy. Andy reminds Geri that he i

Community activist Kwasi is murdered. Simone and Sipowicz investigate with Fancy keeping an eye on them, especially Sipowicz, who's real popular with community involved in the investigation. The pressures and outcome of the investigation get Andy to reveal a part of his past. James and Greg catch a case with a homicide at a bodega that is tough to crack. They have one ""witness"" who refuses to make an ID.

A prince and princess are assaulted and she is now in a coma. Andy suspects the prince might be involved. James gets his first situation as the newly elected delegate. Turns out a member of the department might be married to two women. Organized crime wants Diane to help them with an old case she is familiar with. Mike Roberts provides Andy and Bobby with some information about the prince's contacts. Geri shows Andy what she is wearing and Andy tells her to back off. James' first delegate situation gets a resolution that keeps Ortiz out of trouble with the department. doesn't quite work out as planned. James makes a date with Gina. Greg feels good about his weight reduction. Diane begins her undercover work that involves her getting into a relationship that might require her to start drinking again.

Andy and Bobby look into the death of a limo driver. A new detective joins the squad and her first case involves a man whose life is being threatened. Bobby gets the go ahead from Savino to pursue the further questioning of Henry. Diane puts it an appearance in the squad room and she can't figure how to talk to Bobby about her current assignment. Andy lodges a complaint against Geri that gets her moved upstairs and Gina downstairs. Bobby ""interviews"" Henry and gets the real story.

Simone and Sipowicz investigate the sexual assault of schoolgirl. Gina comes downstairs and Geri goes upstairs. A strange man that Andy had committed to Bellevue four years ago appears in the squad room and makes a minor scene. Diane watches Jimmy turn violent for a minor mishap that occurred while rollerblading. Jimmy sees that Greg has recognized Diane on the street; she plays it off and may have been successful. The strange man returns and Andy thinks that he might be trying to communicate something about his mother. The schoolgirl commits suicide in front of Andy, Bobby, her mother and numerous witnesses. Diane talks with her former and now temporary boss about undercover work, Bobby and things in general. Andy takes the strange man to his building and finds his mother in a dumpster, dead from a heart attack. Despite the fact that no legal recourse can be taken against them, Sylvia reads the schoolboys the riot act. The man that Jimmy beat up comes to the squad to file a complaint.

Diane stops by Bobby's apartment where they make up for lost time. Some female impersonators witness a homicide that they say was committed by a perp who's supposed to be doing hard time for a previous crime. Fancy's former foster son is charged with possession of a kilogram of heroin. After doing their daily lunchtime jog, Greg asks Abby if she would like to have dinner sometime. Unsure of where he might be going with the request, she informs him that she is gay. Fancy tries to get a deal worked with the ""blow hard"" from the DEA who worked out of the squad room last year. A deal is made and Fancy is able to help out his former foster son he is also able to get some revenge on the real mother who's a junkie. Liery's malevolence puts Diane's life in danger when he puts a pill in her ginger ale.

Diane wakes up the following morning in Jimmy's apartment not remembering anything that happened that night. She goes into the squad, where everyone comments on her appearance. She catches a case where a man with muscular dystrophy was killed in a very tight knit community. Witnesses are very reluctant to come forward. Meanwhile, Bobby and Andy work on a case that may have been ""masterminded"" by a married couple whom Fancy wrestles with Bass and knowledge of the fact that Bobby is going to be promoted to detective first grade and Andy is not. Diane confronts Jimmy with her gun (which she fires) about what had happened last night. He claims nothing.

A woman comes in to report that there is a bullet hole in her wall, from a gun fired in James Liery's apartment. Bobby takes the case on the day of his promotion to detective 1st grade. Meanwhile, Andy is thinks that Fancy held up his promotion. An artist wants to get his paintings returned from some mob guys that he is a witness against. He offers to wear a wire. Greg and James investigate a murder that a young runaway boy. Bobby visits Liery at his apartment and brings him in. Later, Andy and Bobby stir things up at the bar Liery frequents. Liery must be let go, with no charges filed; however, the subsequent consequences are fatal for him. Diane is angered about it at first, but gets over it when she goes to Bobby's apartment.

Diane gives her final report to Wallace and Bobby makes dinner plans with Jill. A diamond dealer and his partner report that one of the dealer's sister is missing with a bag of diamonds worth over a million dollars. The broker suspects that his sister's boyfriend is responsible. Andy and Bobby investigate and discover that it is true and then some. Gina is attacked, nearly raped and her face is slashed on her way to work. James, Greg and Diane begin an investigation. James is anxious to find the perp. Greg and Diane wisely advise James to go and stay with Gina, because if he stays it is a ""recipe for disaster."" They find the perp, who lawyers up right away. Fancy suggests that Andy conduct a re-interview of the skel so that Gina won't have to see him again. That decision makes Greg doubt his career choice. Andy worries about Diane's current state of mind. Bobby and Jill go to dinner as Diane goes back undercover to resolve some personal issues; when that doesn't seem to work, she calls

Andy and Diane start to talk, however, they both get paged for the job. Andy and Bobby begin to investigate a murder, but the procedures they must follow (because a cop might have been involved) make them unpopular at the precinct. Greg and Jill investigate the murder of a young girl where the only clue is videotape that starred her crushing worms. As Andy and Bobby's investigation reveals more clues, tension mounts between the squad and the uniforms. Diane goes missing and turns up at Bobby's apartment where she suffers a breakdown. One of the items she recall's is that her father molested her as a child.

Diane and Bobby wake up in his chair the next morning and he suggests that she seek some professional help. Andy, Bobby, Greg and James conduct an investigation into the death of a worker at a construction site, where more than a building is being framed. Geri reports to Andy about a finding a friend of hers who's hung himself. Fancy suggests that Diane and Jill conduct the investigation, which reveals the man died from kinky sex, likely with Geri Turner. James accompanies Gina to get her stitches removed. Geri makes an interesting interview, she demands that Andy conduct the interview or she is ""going to lawyer up."" Geri opens up to Andy. James offers to stay the night with Gina, who doesn't mind at all.

Simone and Sipowicz investigate the murder of a woman whose body was found naked in the trunk of a car in a junkyard. Gina returns to work. A man's body is found with a severe blow to his head. James and Greg eventually discover that the murder weapon was a typewriter. But how and who delivered the blow? Bobby hires Henry to take care of a painting job in the tenement building; Henry comes in complaining about the difficult tenant. Diane is working through her issues with her family and a counselor. Bobby and Henry talk with the difficult tenant.

Fancy (with his wife) is pulled over for a burned out taillight. He and the uniform don't see eye-to-eye on the procedures followed during the stop. Andy has some unresolved issues to work out with Andy Jr.'s death. Bobby works the night tour and gets a case that involving a bar robbery. Another detective working a similar case comes to share information, though Bobby discovers the information the detective has given him is wrong. They have words when their paths cross later in the investigation. James helps a woman, who's wheelchair bound, find the criminals who pulled a scam on her. Diane has a woman with a similar story. Together they set up a sting operation. Fancy discusses with Bass a course of action for the officer who pulled him over. Abby makes dinner arrangements with Greg.

Andy and Bobby investigate the murder of a woman whose body was found dumped in an alley. They interview a strange suspect but other information tells them the woman was a mail order bride who was looking to divorce her husband. That makes him the prime suspect. Greg and James look into the drive by shooting at a bus. One of the passengers mouths of at Abby and that gets Greg's ire up. Throughout the rest of the day, Greg gets tough. He is nervous about his dinner with Abby later the evening. Andy works his part-time job for the US Marshall by doing ""dump detail"" at the airport.

Bobby and Andy investigate a shooting that is related to the victim trying to leave a gang. Greg waits with anticipation of his dinner with Abby and her significant other. Jill and Diane investigate the death of a baby who appears to have been shaken to death by the baby-sitter. Greg and James look into a murder where they have a suspect who looks guilty despite the fact he claims to have an alibi. They try a get-tough philosophy for their interview but sometimes ""TLC"" is all you need to get a confession. Greg meets with Abby and her lover Kathy. Bobby and Diane go out for a movie and later Diane wants him to ""show me the ring.""

Two female impersonators come into the squad room; one of them is seeking protection from a man who's beaten him/her. Arthur's wife asks him to let the squad know about some products she is selling. Jill pursues the investigation of the theft of some small items by an old friend's parents. Her old friend is drug user. The transvestite is murdered; Andy, Bobby and Diane investigate and eventually receive help from an old friend. Medavoy calls in sick and Arthur worries that it might be related to Lillian's products. Jill's old friend turns up at her apartment strung out on drugs; while her parents dropped their charges, Jill is filing her own. Bobby and Diane try to make plans for their wedding, but while at a restaurant they encounter an old acquaintance of Bobby's who is an ""independent"" stick-up man.

Simone and Sipowicz catch a very early morning case involving a shooting with a rap artist who refuses to cooperate in identification of the perp. His lack of cooperation and a very tired (and a sometimes slaphappy) Andy makes for a very interesting investigation. Abby tells Greg what was on her and Kathy's mind; they are looking for a donation that will get Abby pregnant. Off. Szymanski implies that Fancy was one of the ones responsible for his being set-up and caught in the alleged theft of a drug dealer's money. Fancy conducts his own investigation. Later, Bobby is propositioned by the Feds to help them with their ongoing investigation into the affairs of Joey Salvo. Greg tells Abby his decision concerning her proposal.

Five Ecuadorians are killed and Bobby, Andy and James work the case and it doesn't go to well, until a waiter comes forward. Just before they find out they have to go on ""garbage detail,"" Bobby tells Andy he has to meet someone. The ""someone"" he is meeting is Joe Salvo and he has little favor to ask of Bobby. Greg nervous about meeting his commitment to Abby and the results of their initial investigation hampers Russell's interview with their suspect in a spousal abuse and child molestation. While Greg is trying to take care of his commitment, he finds out who is stealing his quarters. Upon completion of his first little job, Joe asks Bobby if he can do one more thing.

A bus is ""hijacked"" and wrecked by an inebriated Vince Gotelli, the cop with medical problems and who's a mere 2 months from having 30 years on the job. However, Fancy meets with the bus driver's boss to work out an arrangement about their investigation of the bus incident and he suggests that Vince take a medical retirement. Bobby has regrets about his participation in the FBI investigation into Salvo when the ""Rat Squad"" begins investigating him for the license plate number he ran. Especially after he discovers no one, Fancy or the FBI will stand up for him. Andy resents that Bobby will not tell him what's going on. Meanwhile, they must investigate the rape and beating (and eventual death) of a woman in her apartment. Their witness identifies the perp, despite his misgivings about doing the right thing. In the end the witness pays the price for his cooperation. With IAB breathing down his neck and the necks of everyone in the squad, Bobby asks Diane to stay somewhere else while he tr

Bobby tells the FBI that he will talk to the lieutenant from IAB, if he does what they expect he might do, then Bobby is through with his part. Or so he thinks. After his interview, he begins to help Andy and Diane with their investigation of a homicide. The victim's psychiatrist thinks the father is the one they should be looking at. They think differently. A man from a magazine that wrote a bad story on the cops in New York, needs their help when his mugged trying to help someone in trouble. Greg and James help him out. Meanwhile, IAB brings Bobby up on charges and they suspend him from active duty. Later, Martens reports that he has also been suspended. Knowing that he was suspended from duty, Joey Salvo asks Bobby to do him another favor. Bobby goes out to meet Salvo, in the midst of their discussion there is gunfire and Salvo hits the ground. Andy tells Bobby he'd better get the hell out of there.