When the winner of the city's Good Samaritan Award is murdered, Gee and his staff are called to help the new female night shift commander. Pembleton is at odds with the detective he shares a desk with. Beau and his wife separate and Kay gets caught in the middle. Meldrick and Munch have plans to buy a bar and try to persuade Bolander to also become a partner. Bayliss agrees to become a ""silent"" partner. In passing, Crosetti is said to be in Atlantic City on a ""shots, slots and sluts"" dream vacation.

A young man comes into the squad room and after getting their attention, tells the detectives that his brother has been shot. Pembleton is sued by the multiple personality serial killer, who states he violated her civil rights during interrogation; he is discouraged when the city agrees to settle out of court. Munch must attend an alcohol awareness seminar to meet a requirement for the bar. Lewis has ""love at first sight"" with a woman who makes models of crime scenes, but she has ""love at first sight"" when she sees Bayliss and he sees her. Later, they attend an art exhibition and have an unusual sexual encounter in her ""bed."" All is not well at the Felton household, when he returns home to a cleaned out house.

The deputy commissioner invites Pembleton to lunch and gets him to investigate a case involving a congressman. Beau hires a private detective to find Beth and the kids when his clue that they are in Wilmington falls through. Howard and Felton investigate a case of a dead homeless man. Their job is made more difficult when they can't find the body. Lewis and Munch investigate the death of a motorcycle gang member. Pembleton finds out the truth, participates in the cover-up and then resigns when the media gets hold of the real story and the deputy commissioner doesn't back him up.

Beau meets Megan's cousin, NBC's Tim Russert. Kay and Stan return to duty, after Stan undergoes a final test, and Kay finds her desk has been moved. They, like Beau, must both get used to the job again. Tim and Beau investigate the discovery of a skeleton found buried in a backyard. Bolander and Munch discover an unlikely suspect in the murder of a quiet elderly couple: their grandson. Gee exposes Granger, who used his relatives in some department plumbing contracts; the information is leaked to the papers, Granger is forced to retire. Barnfather is made colonel and a new captain is named, Megan Russert. The higher ranks of the Baltimore police department are now more politically correct, but Gee doesn't like it.