Giardello receives a surprise visit from his daughter, Bayliss and Shepard try to bring a criminal to justice and Lewis and Falsone investigate a stabbing.

Sheppard and Ballard investigate a teenage girl's murder, while Munch's fiancée asks him to settle a dispute between ex-lovers.

Giardello and Gharty get involved in a hostage situation in which a man holds his children at gunpoint and threatens to blow up an apartment building.

Munch and Bayliss attempt to identify a corpse stabbed in the medical examiner's room, while Lewis and Falsone investigate a man's murder during his barbecue.

An assistant U.S. attorney confesses to killing her ex-husband, but claims battered-spouse syndrome as her defense.

Bayliss rethinks his spiritual beliefs during the investigation of a Buddhist monk's murder.

A woman asks the police to reopen the case of her supposedly killing her baby brother by accident when she was 3 -- a case Giardello originally handled in 1972.

The New York and Baltimore detectives re-team to investigate the murder of a government worker and expose a connection to the White House.

Ballard and Bayliss must find out if a woman's death on the night before her wedding was murder or suicide.

A murderous webmaster announces on a website run by a homicide detective that he will kill women live and on-line at specified times and taunts the Baltimore police force to try and stop him from perpetrating the crimes.

Munch questions Gharty's war record as they investigate the hit-and-run death of a Vietnam veteran.

A skeleton of a young woman is discovered, leading to the solution of a long-forgotten bank robbery. Finding her killer is more difficult when one suspect is dead and the other two accuse each other. Meanwhile, Gee lays down the law about detectives on the same shift being romantically involved. Which is more important, relations with police partners or a lover?

A white bus driver is beaten to death after he drives into a West Indian woman. In a nearby alley, a young black man is also found beaten to death. Racial tensions divide the Homicide squad as well as the city of Baltimore, but the true causes are not what they seem.

Even though the young mother of the suffocated newborn has made a deal to testify, her boyfriend is convinced she will not wrongfully accuse him--because of their love. Falcone tries to talk sense to him, but he remains convinced she will not betray him. He is shocked at the turn of events in court.

Investigation continues on the case of the newborn baby found buried behind a motel. The teen mother's parents employ a P.I. to frighten her into accusing her boyfriend. Police and prosecutors proceed to the Grand Jury, hoping to pressure one of the young parents to make a deal by letting them experience jail time. It works!

Bounty Hunter Dennis Knoll tracks down fugitive Joe Errico in Florida, meanwhile Bounty Hunter Jerry Lichte nursing a broken arm in a car accident in a Baltimore Homicide detective car and a random driver, is relegated to a desk job at Patriot bail bonds. Bounty Hunter P.J. Johnson is excused by the Baltimore Police in the Shooting death he was accused of.

Bounty Hunter Jerry Lichte is caught up between catching drug addict Joe Errico and his partner P.J. Johnson on the tough streets of Baltimore and being pursued themselves by the Homicide Division.

FBI agent Giardello is put in charge of the investigation of a mass poisoning case.

A popular author of thrillers is missing; his wife has a video in which he warns that his agent may kill him. Discovering that he had a mistress and finding his car at the airport, she is ignored UNTIL the mistress reports him missing as well. No body, no weapon... can the two probable killers be charged?

After being shot at, a wealthy doctor shoots an intruder in his garage. Homicide determines the body is his sister-in-law. Two sets of fingerprints are found on her gun; the money trail (gambling debts, forgeries, insurance) leads to an unlikely conspiracy.

Lewis and Sheppard investigate the shooting death of a man in his own home. The long-standing rivalry between the victim and his identical twin brother leads them to a reason for the killing. Ballard and Gharty team up with a narcotics detective from Washington, D.C. to check out a teenager's fuzzy account of a D.C. drug buy that led to his friend being shot and killed. Mike surprises Gee with news of his transfer into the BPD as an FBI agent liaison, and Gharty decides to leave his wife.

Bayliss, Gharty, and Ballard return to duty to find a completely remodeled squadroom and a new detective in the unit: Rene Sheppard, fresh from the fugitive squad. Everyone is called in to work a trio of savage murders in Little Italy, with one of the victims being Gee's cousin Mario. Gee's estranged son Mike, an FBI agent stationed in Phoenix, arrives in town and helps close the case, whose roots stretch back to Mario's choice to testify against a union boss 25 years earlier. Bayliss exhibits a new, Buddhist-influenced philosophical attitude toward his work, and hints of relationships among the detectives begin to surface - including one between Munch and Billie Lou.