O'Brien, Giambone and Kirkwood investigate the murders of the trainer and jockey of a prize racehorse.

Colby and Carson (Eugene Clark, Stephen Mendel) are the subject of a department investigation. Guest star: Leslie Toth. With Scott Hylands and Jeff Wincott.

O'Brien and Giambone investigate the death of a star college hockey player who had ties to a gambling ring.

An unbalanced woman from O'Brien's past makes an attempt on his life and injures Nicole in the process.

The death of a young model leads O'Brien, Giambone and Kirkwood to a top model embroiled in blackmail.

During a radio interview, Hogan (Sean McCann) is challenged by a murderer he previously arrested. Guest stars: Alan Scarfe and Frank Moore. With Scott Hylands and Jeff Wincott.

A woman's mysterious death sends O'Brien and Giambone to investigate her adopted child's birth mother.

O'Brien (Scott Hylands) believes that an off-duty police officer (Jason Miller) helped a drug-case suspect escape. Guest star: Cynthia Dale. With Jeff Wincott.

An abused wife (Carol Lynley) comes to Kirkwood for help; O'Brien and Giambone search for a pimp's killer.

A member (Lee Montgomery) of a youth league basketball team is implicated in a street gang murder. Guest star: Hector Elizondo. With Jeff Wincott and Scott Hylands.

The reappearance of his first partner's killer rekindles O'Brien's memories and renews his determination to capture the man.

A lounge singer is seen arguing with his cousin over money. The cousin is later found murdered. Does the lounge singer have ties to the mafia? O'Brien and Giambone seek the cooperation of a frightened singer (Danny Aiello) blackmailed by the mob.

The enraged father (John Winston Carroll) of a runaway (Lisa Schrage) who turned to prostitution is accused of murdering her pimp (Bruce Tubbe). With Scott Hylands and Jeff Wincott.

Whitey's cousin becomes a murder suspect when the limousine he drives appears to be connected with several deaths.

Sympathy for the man's family makes Giambone reject suicide as the cause of a failing industrialist's death.

An eager TV newswoman (Cynthia Belleveau) puts her life in danger when she reports on a crime family's activities. With Scott Hylands and Jeff Wincott.

O'Brien and Giambone enter the world of child pornography while seeking a runaway whose father was killed searching for her.

A rape victim learns that her assailant has been released from prison after serving only four years of his sentence.

A young astronomer sees a homicide through her telescope, but her frightened mother will not let her testify.

O'Brien and Giambone (Scott Hylands, Jeff Wincott) uncover a drug-smuggling ring that uses innocent senior citizens as couriers. Guest stars: Kay Tremblay and Cec Linder.

When a mobster decides to testify against his boss, O'Brien and Giambone grudgingly agree to protect the informant.

Kirkwood's old friend, a presumed-dead rebel leader in South America, wants everyone to know he is alive.

Giambone and O'Brien (Jeff Wincott, Scott Hylands) are faced with a drug war after a narcotics dealer is slain. Guest star: Dean Richards.