When another woman is murdered by the serial killer, the detectives arrest a suspect... and discover the killer's identity; and expecting a baby, Sipowicz and McDowell decide to get married.

A man armed with a bomb walks into the station house and handcuffs himself to McDowell; unless the detectives release a Russian mobster from jail in one hour, the bomb will detonate.

Andy's off-duty and slightly underhanded work to prove that Hatcher killed his own wife lands him a transfer out of the 15th precinct and into the Bellevue Morgue engineered by Detective Hatcher. Meanwhile, the squad is up to their whips and chains after a dominatrix is found murdered.

A face from Clark's past makes an unwelcome return, while the key suspect in Andy's 18-year-old murder case turns up, face down. Jones helps Michael prepare to take the stand against his own father for killing his mom, and a man fears that his wife is going to lose her head after he loses her pricey necklace.

The detectives investigate the shooting death of a man whose brother is a registered sex offender; and when Captain Fraker's trial gets underway, Sipowicz worries that his own testimony may have harmed the prosecution's case.

Sipowicz and Clark investigate the death of a transvestite whom a friend insists was having a relationship with a married man; a surgeon's hand is badly cut during a robbery; and Rodriguez testifies in the Fraker trial.

The detectives search for clues when a group of perpetrators torture a man for no apparent reason; a woman reports her husband as missing, but Sipowicz and Clark suspect she's not being completely forthcoming; and Fraker testifies in court.

The detectives investigate a strangulation murder that may be tied to one of Diane Russell's cases; Russell consults a doctor when she discovers a lump in her breast; Medavoy and Jones investigate an arson linked to two boys.

Sipowicz, Russell, and Clark attempt to connect the murder of a young woman to two other killings; Medavoy and Jones investigate the shooting death of a mother whose children feared her.

Sipowicz and Clark search for two burglars who terrorized a retired cop and his wife; Medavoy and Jones assist an author who wrote a book on how to avoid paying income taxes; and Jones deals with Michael's father.

When a Jewish jewelry-store owner is murdered, the detectives focus their investigation on two suspects: a Caucasian man who converted to Islam, and a rap star whose expensive jewelry turned out to be fake.

Sipowicz and Clark investigate the shooting death of a jogger who'd been having an affair with a police officer; and Medavoy and Jones search for answers when the body of a comedy club owner is found in the trunk of a stolen car.

A new detective, Stan Hatcher, joins the squad; the detectives investigate a shooting death that Hatcher believes is linked to a dispute between gang members; and a man insists that his young daughter has been kidnapped.

A kidnapping victim's startling statement clues Andy and John in on a serial sadist keeping women locked in a dungeon somewhere in New York. Meanwhile, a routine robbery investigation takes a saucy turn for Medavoy after he makes an unlikely connection with the 60-year-old victim.

Sipowicz searches for the truth when Hatcher is shot by a man who mistook him for a burglar; and a former pharmacist dies in a flophouse when someone fires a bullet into his room.

Haywood reopens an 18-year-old case that has Andy reliving a major mistake in his career. Meanwhile, Sipowicz and Clark investigate the death of a man whose brother was pursued by a bounty hunter. Elsewhere, Ortiz gets a new partner, Detective Kelly Ronson, who ends up lending an unusual hand during the hunt for the child an ex-con had to give up before going to prison.

A man's gunshot-induced amnesia causes Jones and Medavoy to concoct an unconventional way to nail his assailant. Meanwhile, a man Sipowicz put away twenty years ago for raping and murdering a 12-year-old girl goes free after DNA testing exonerates him, and Ortiz and Ronson bust a gruesome underground network pre-teen prostitution ring.

Andy and John approach Mrs Clifton for help with her daughter's murder. Jennifer turns up out of the blue, apparently off her meds. A man is shot, apparently over a church and a video tape.

Sipowicz investigates a murder involving the victim's current husband and ex-husband. A longtime informant gives Ronson information about an illegal gun shipment, but the suspect's father is being followed by the FBI. Jones gets into a fight with Craig after he's acquitted of murder charges, and Sipowicz is the proud father of a baby boy.

The detectives investigate the strangulation death of a former porn star; a thirteen-year-old boy holds the key in implicating his father in his mother's murder; and the jury reaches a verdict in the Captain Fraker trial.

A woman survives the serial killer's attack, and her account prompts the detectives to focus on Carlin, his partner, and a bodyguard; Medavoy and Jones investigate when an off-duty officer kills a man; and McDowell comforts Russell during a biopsy.

Sipowicz and Clark search for an African-American driver who fled the scene of a hit-and-run accident after unwittingly running over an Italian mobster's young daughter.