When a passerby foils a crime, his reluctance to be recognized publicly masks a violent secret past. Guest stars: Richard Hardacre and Chris Wiggins.

An unfaithful wife and a seedy detective lead Giambone and O'Brien to the killer of a suspected embezzler.

An ex-con living in a residential halfway house is accused of murder. Guest stars: John Wildman, Dixie Seatle. With Scott Hylands and Jeff Wincott.

Lt. Hogan and O'Brien (Sean McCann, Scott Hylands) resume their investigation of a 7-year-old bank robbery case. Guest star: Lane Colman. With Allan Royal.

Giambone believes someone with a score to settle shot a veteran officer during a routine domestic-violence call.

Stevie (Louise Vallance) falls for a married restaurateur who is a suspect in a stolen-goods ring. Guest star: Stephen Mendel. With Jeff Wincott and Scott Hylands.

Giambone goes undercover as an aspiring fighter to investigate the drug-related death of a professional boxer.

A guilt-ridden O'Brien (Scott Hylands) pursues a crazed killer (Winston Rekert) whom he once surrendered to the justice system. With Jeff Wincott.

O'Brien and Giambone investigate the shooting of teenagers who took a joy ride in a terrorist's car filled with weapons.

Giambone and O'Brien follow a cat burglar whose theft of a call girl's diary worries several city officials.

The killing of an innocent bar patron instead of an undercover narcotics agent exposes a web of double dealing.

O`Brien takes mugging victim Nicole to his apartment, unaware that her assailants have found his address in her purse.

Thugs stalk a runaway girl who witnessed a deal between a crooked union boss and a special prosecutor.

An ex-con who was sexually assaulted in prison stalks members of the city's gay community. Guest stars: Steve Marshall and Patrick Young. With Jeff Wincott, Scott Hylands and Stephen Mendel.

Kirkwood happens on a serial killer when he goes undercover as a derelict to research a story on the homeless.

A pretty museum curator helps investigate an art theft that occurs when a mystery man causes a disturbance.

An ex-con and his sister (Timothy Van Patten, Jessica Steen) recruit young people to fight crime in their neighbourhood. With Allan Royal, Scott Hylands and Jeff Wincott.

O'Brien and Giambone investigate the death of a young wife who is killed when her airport limousine is sabotaged.

O'Brien and Giambone are torn between duty and justice while investigating the stabbing death of a fascist group's leader.

O'Brien and Giambone (Scott Hylands, Jeff Wincott) investigate the murder of a fashion designer's assistant. Guest stars: Maury Chaykin, Susan Henley.

A security guard (David Ferry) hitches a ride with a group of drug smugglers. Guest stars: Suzanne Coy, Clark Johnson. With Scott Hylands and Jeff Wincott.

Investigation of an illegal alien's death propels O'Brien and Giambone into the politics of a Caribbean nation.

O'Brien risks his career and his relationship with Nicole when he becomes entangled with a murder suspect.