A skull and a computer-generated image lead the squad to the parents of a 14-year-old rape victim.

In 1995, Barbara Taggert was found burned to death in her home, and her six-year-old daughter Lisa was missing. Her husband Spencer was their prime suspect, but his business partner had given him an airtight alibi. When Bill Harris rescinds his alibi to try and get off on fraud charges, the squad re-opens the investigation into Barbara's death.

The Cold Squad begins an investigation after a homicide victim's gun is traced to a 15-year-old unsolved double murder in Chinatown. (source: http://www.coldsquad.com)

Ali and Logozzo investigate the case of Stephanie Jordan, a debutante who disappeared four years earlier and was presumed, but never proven, to be dead. Her husband, reporter Turner Jordan, is their prime suspect, and he puts a serious crick in the investigation by making a televised plea for anyone with information to phone the police. Logozzo is frustrated because his daughter from his first marriage is not only getting married outdoors, she has invited his third ex-wife Vivian, with whom Logozzo does not get along.

During a routine traffic stop, an officer arrests a shop-lifting suspect named Amanda Millerd. After she is taken to the station and booked, Ali and Jill realise that her fingerprints match those of Holly Tarrow, a prostitute believed to have burned to death on September 6, 1982. Although initially Holly maintains her identity as Amanda and claims she's in the city with her husband Grant and son Ethan, she soon admits that she is Holly, and that while at a party with her then-boyfriend Wesley Belmont, Amanda was accidentally killed by the owner of the house.

As an investigation into a 20-year-old killing spree continues, the Cold Squad is rocked by murder and internal strife.

Harper struggles to build a case against a murder suspect, after an investigation that lasted 18 month long.

The squad discovers what happened with Billy Wells and Michelle Ripley.

The squad gets involved in the world of street racing.

When Ali is on her way back from a routine prisoner transfer, Winslow accidentally crashes the car (somewhere off highway five between Clearwater and Little Fort), leaving Ali and himself relying on the prisoner they're transporting, Paul King, who is accused of the brutal murders of two men. Ali and the prisoner both beg Mitch to uncuff Paul so that he can help them (Ali has a spike through her arm and Mitch has suffered heavy internal injuries), but Mitch absolutely refuses. When Mitch finally dies from his injuries, Ali begins to talk to the prisoner, who maintains his innocence in the murders and swears that he's only out to save the environment.

Years ago, Pierre Martin was convincted of murdering Randall Bettinger, but suddenly Bettinger turns up alive and well, making Len, who had busted the case, look very bad. Within 48 hours though, Bettinger is found dead for real, and Casey brings in both Nicco and Len to work the case, and each uses their snitches to help prove who murdered Bettinger. Mickey gets pulled in when the murder of 6-yr-old Jeannie Yan is reopened after nearly ten years, because the girl was the first dead child she ever saw. She asks Ali to investigate, and when Ali begs off, Mickey begins doing some detective work of her own.

With her life in shambles and Det. Logozzo in the hospital after the warehouse shooting, Ali spends most of her time with her partner. Simon is somewhat involved in the investigation, but most of this episode is used to introduce the new characters in the series as they try to solve an old murder that has connections to the boy Ali hit. It turns out the youngster had a weapon and it is tied to the murder. Meanwhile, Simon tries to patch up things between him and Ali and learns where Ali was when she was supposedly on vacation ... she had an abortion.

An 18-year-old girl agrees to allow the man who raped her,Lance Rivet, to go free after the mother of a rape victim convinces her that he has information that could nail her daughter's rapist and murderer, Rivet tells them that T.J. Larper killed her and another girl but evidence reveals that Lance committed one of the murders himself. Unfortunately, they can't touch him.

Nicco has a lot of trouble dealing with the case of a teenage girl who was murdered, remembering a girl in his past that went missing. When queried by Sam, he admits that this is his first kid case. Mickey and Ali investigate an American serial killer who claims to have murdered two girls in British Columbia, believing the man is just trying to escape the death penalty. Kyle Bradley identifies one girl as his sister after shown the teddy bear pendant found by her body.

When a woman is murdered by a stalker, new clues emerge in the case of the prostitute killings.

Christopher Gerald Williams was ten when he was taken from the bedroom he shared with his seven-year-old brother Joey in 1977. Twenty years later when another body is found, Tony realises that David Sawyer was killed in a way very similar to young Christopher, and Ali joins forces with Iredell to uncover the killer. After doing DNA tests, the squad realises that the same man killed both boys, and they begin investigating Victor de Jarre and Jacob Knewling, who were suspects in the first investigation. Ali tries to get what she can out of Christopher's now-grown brother Joey, who has become an alcoholic.

Twelve years ago, a teenaged girl named Janine Elston was shot while she slept in her bed. Her father, a former cop, goes to Cold Squad to ask for help when Wayne Corby, the man who was believed to have killed her, is about to be released from jail. Since Corby was never charged with Janine's death, he could still be held responsible.

The Cold Squad uncovers a link between the gruesome murder and decapitation of two nurses committed more than 20 years ago. (source: http://www.coldsquad.com)

Tony and Ali investigate Theresa Sandiman, a prostitute Tony has long thought responsible for a murder.

After Sandy Kilkenny is arrested for tossing a pool cue at her husband's head, the squad brings her in hoping that they can finally put to rest the murder of Rita Brice eight years ago. Unfortunately, even though Ali goes undercover in a cell with Sandy, she refuses to implicate her husband, even though everyone tries to tell her that Neil Brice is no good.

Four years earlier, Rikki Stanfield lied to Ali about what she remembered the night that she and her best friend, Michelle Dorn, were attacked to get Ali to leave her alone. When Rikki starts to remember what really happened she begs Ali to re-open the case, and despite Logozzo's feeling that Rikki is a few bricks short of a load, Ali takes on the case.

A 12 year old case where a murdered woman's death matched the M.O. of a now-convicted killer seems to be yet another victim. Until investigation shows the killer couldn't have done it. He was already in prison. McCormick and Logozzo try to find who was the original killer and who was the copycat. This two-part episode introduces Inspector Simon Ross.

While enjoying a day off, Ali receives a tip from a lawyer friend about Randy Benjamin, a young man who had assisted Simon Willard in the rape and murder of three young men years earlier. Attorney-client privilege prevents him from saying much, but he points Ali towards the murder of Stanley Caron in 1993. After getting some information from Schneider, who is now in private security, Logozzo investigates the hotel where Caron died, and Ali, based on tips from a street hustler and the carefully veiled comments of her friend, picks up on the trail of a young punk named Jack Rodgers, which leads right back to Randy.

While Ali and Logozzo investigate the murder of retired teacher Merv Doucette, they are surprised to learn that, after a stroke, Doucette's behavior had changed drastically, and he'd gone from being a mild-mannered school teacher to a sex fiend who went to swinger parties. His wife, also a teacher, just happened to teach at Radford, where Jackie had gone to school. While Eddie tries to figure out how much money Jackie's family must have had to send her to Radford, which Logozzo estimates costs in the neighborhood of $30,000 a year, Jackie helps Ali question the widow after they realise that the prime suspect, Donnie Coombs, works for her, and came into a windfall the day after the insurance payout on Merv's life.

A standard pick-up for the drunk tank marks the start of a 34-year old cold case involving three men who were involved in the murder of a beautiful woman. The drunk is carrying her dress and tells a bizarre story of murder that involves his college roommates who are now prominent professionals in business. McCormick is relentless in the case and impresses Ross with her work. As she struggles with the case, Ross tells her as he leaves that he will be thinking about her as his head hits the pillow.