After another late night out Clark arrives late at a crime scene, wearing the same clothes he wore the day before. Sipowicz comments that his new lifestyle doesn't suit him. Back at the squad, Det. Laura Murphy has joined the detectives as Ortiz's new partner. She comes from a group that did background checks on future cops, no real detective work according to Sipowicz. She assures him that her three years as a uniform have prepared her for working on the street. They are also anticipating the arrival of a new CO. The morning's victim, a Dr. Miller, was reported to be in New York researching a book and he received two phone calls that the detectives are going to follow up. Sipowicz receives a package containing a dead rat and a note "PAB", which Clark laughs off. Out on the street, Ortiz and Murphy go to the scene of another homicide, where Murphy runs into Off. Keogh, someone she went to the academy with. The victim, a homeless man, was observed by a witness to be hanging out with a couple of squares (who were on a "field trip") and "King Tut." Murphy ask Keogh if he can get in contact with "King Tut" and he tells her for that for her he'll do anything. Sipowicz and Clark interview Larry Praegitzer, the man who their DOA (Miller) had talked to via his hotel phone, but Praegitzer doesn't indicate he knows anything about what Miller was really doing in town; he does them a story about Miller and a prostitute. Murphy and Ortiz talk with "King Tut" down in the precinct lobby and after a $20 incentive he tells them about the rich people who come to pretend they are homeless on weekends, something they call "Street Embrace." They let him go and Murphy asks Keogh to keep an eye on "King Tut." Jones tells Sipowicz that a phone dump of their victim's cell phone indicates that he was talking with Eric Praegitzer, son of the man they just talked with. Eric Praegitzer is on his way into the precinct. The new Lieutenant (Thomas Bale) arrives, he comes from Internal Affairs and Sipowicz advises his fellow detectives that "the time to start covering your ass would be right about now." Sipowicz connects the dead rat he received in his package with the arrival of his new boss, a former member of the "rat squad." Jones tells them that their victim was a prominent sexologist back in the 60s. Ortiz and Murphy are leaving to follow up on a lead, when the new Lieutenant wants to know what they are up to. Eric Praegitzer tells the detectives that Miller contacted him about wanting to know some tourist information. The detectives have knowledge that Miller helped Praegitzer through a suicide problem he had three years earlier. Ortiz and Murphy talk with Zoe Prentiss about what she knew about their victim and her participation in the "Street Embrace." After leaving the interview, Ortiz offers Murphy some advice about her flirtatious nature, which Murphy denies that she is doing. She comments that she is always able to get along with guys, but usually can never get along with women. Medavoy has his talk with Lt. Bale, but Bale's question about how much longer he plans on being on the job puts him on guard about his future with the squad. Jones reports to the others that he has found information that 10 years ago Eric Praegitzer was a woman named Jennifer. They decide they need to reinterview him. Clark tells Murphy and Ortiz that the gun used in their homicide is registered to a PI named Charles Isadore. When Clark decides it is more important to call back a "chick" Sipowicz decides it's time to have a talk with Clark about his recent behavior, which he believes is related to the death of his father and his girlfriend. Clark tells Sipowicz has a specific job related complaint, he tells him that he doesn't want to hear anything about what he does after work. Sipowicz warns him that he better get "his act together." Murphy and Ortiz talk with Charlie Isadore about his part in the death of their victim. Charlie tells them that he was hired by Zoe's father to keep on an eye on her while she participated in the "Street Embrace." He tells them that Zoe recognized him for not being who he pretended to be and that she managed to get hold of his gun when the victim was harassing Zoe to the point she wouldn't take it anymore. Eric Praegitzer is brought back in for further questioning about his past as a woman. They want to know if Miller had performed his sex change operation. He tells them no. They wonder is Miller might have been trying to blackmail him, letting his secret be known. He tells them that he has just minded his own business and never hurt anyone. Meanwhile, Murphy and Ortiz are listening to Zoe Prentiss tell them that was Charlie has said is just crazy. She says she left after the victim had called her rude names. She left Charlie and victim both alive. Sipowicz gets another "PAB" call. So they don't get into an overtime situation, Bale tells Murphy and Ortiz to let the DA's office to sort out their deadlock situation with Charlie Isadore and Zoe Prentiss's story both in disagreement. While Bale watches, Larry Praegitzer tells Sipowicz and Clark the real story about Eric's gender. Their victim had performed the initial surgery on Eric, which made him a girl, after an accident with a circumcision instrument destroyed Eric's penis. Miller had a theory and Eric's parents tried to raise him as a girl, but Eric always knew deep down he was a male. Miller kept coming back into his son's life and Larry Praegitzer had warned him that if he ever contacted his son again, he would kill him. When Miller called this time, Larry Praegitzer kept his promise and killed him. Sipowicz tells him that they are going to help him with his statement, after they confirm this story with Eric. Off. Keogh tells Murphy that he has seen "King Tut" in brand new clothes going into a hotel with a hooker. They decide to go and investigate this turn of events. Eric Praegitzer tells his story to Sipowicz and Clark, which confirms what the father had just told them. They go back to the interview room, to find that Bale is with Larry Praegitzer. Bale tells them to leave the room. "King Tut" tell the detectives that he got the money from Zoe and he tells them the same story about Zoe that Charlie Isadore did. Bale has Sipowicz and Clark in his office and lets them know that he isn't going to stand for any falsified statements, such as the one they were likely going to work out with Larry Praegitzer. Bale believes that it is up to the jury to do their job once they know the Praegitzer's story. Sipowicz and Clark both try to tell him that this is the only place where good people, who have had to do a bad thing, are going to get any consideration. Bale tells them that their job is not to reinterpret the facts. Sipowicz tells Bale that with his 32 years on the job he plans on leaving on his own terms, but if he can't live with what he being forced to do now, he will leave. Bale tells him that is a decision every cop eventually has to make. Things only get worse for Sipowicz when Jones tells him that he needs to come out to the parking lot. Sipowicz's car has had all its tires flattened, and it is revealed that "PAB" stands for "Payback's A Bitch." Someone has it in for Sipowicz. Back upstairs, Bale tells Murphy she did well having Keogh keep an eye on "King Tut." She tells him that the credit should go to Keogh. As he gets ready to leave, Bale feels it is important that all the detectives know something. He tells them that it is the department's perception that the 15 Squad is a rogue outfit and that he has been put in charge to make sure that they represent today's policing. The detectives can either cooperate with that plan or have Bale's support or they won't be working here anymore. Clark finds it ridiculous and believes they are so screwed. Medavoy is worried, but Sipowicz "ain't changing a damn thing."moreless
To promote this final season, ABC ran ads claiming that the season would air consecutively without any breaks in between weeks. However, this turned out not to be true as they took some time out for election related coverage. ABC did, however, air the final season without any repeats.