Da Vinci and Shannon investigate a death that brings them face to face with their own ethics. Meanwhile, Leary takes on a dangerous undercover assignment.

Da Vinci, Leary and Sunny are in Seattle at a conference, and are shocked to discover similar cases across the Pacific Northwest, that appears to include the death Da Vinci is currently working to solve.

Larry Williams is out on bail. Da Vinci and the police must find evidence that will put him behind bars before his fantasies lead him to kill.

Da Vinci examines the scene of an industrial accident. Meanwhile, Shannon and Rose investigate when a woman dies in an ambulance en route to the hospital.

A noisy house party ends in tragedy when a fifteen-year-old teenager is found shot dead. Initially it looks like another death in a recent spate of teen suicides in Vancouver. Rumors soon start circulating around her school that she didn't fire the gun. As the teenagers close ranks Da Vinci, Leary, and Kosmo find it difficult to piece together a clear picture of the unpopular girl. The school counselor describes Jodie as an intelligent, hard-working loner, and a talented writer, whose only close friend was her sensitive, highly intense boyfriend Peter Florick. Jodie's brother, who owned the handgun, had previously warned Peter away from his sister and even Peter's classmates think he killed the girl. Troubled by his own ignorance of his teenage daughter Gabriella's friends and feelings, Da Vinci initiates a thorough investigation. The net tightens around Danny when a mobster's girlfriend, Summer, seems to be getting too close to Leon. It becomes suffocatingly tight when Leon confronts the undercover cop who has been tailing him.

Da Vinci, Leary, and Sunny are in Seattle attending an international Homicide Conference. A presentation by San Francisco-based FBI Special Agent Charlotte Turner turns up similar cases across the Pacific Northwest, and appears to include the death Da Vinci is currently working to solve. Turner comes to Vancouver and Da Vinci finds himself coordinating an investigation that has international implications. As more abductions/murders fit the pattern it seems that a couple, Dean and his wife Mona, are responsible. Joanna, a young woman who was abducted but managed to escape, leads Shannon and Leary back to the farmhouse where she was held and they arrest Dean. Mona, however, has managed to sneak across the border into the States and Da Vinci offers Danny a deal if he can find out where she is. Meanwhile Da Vinci finds himself struggling with the ethics of paying Dean for information about other victims.

Da Vinci desperately searches for the truth behind a death in custody and implications of police corruption. The death of an elderly woman during a suspected home invasion puts rookie Coroner Winston at odds with the Chief Pathologist.

Da Vinci investigates the death of a man left to die outside the emergency room. The whole homicide team is called in when an infant is abducted from her nursery.

Da Vinci reopens several cases, causing a further rift with his ex-wife.

Da Vinci is convinced a serial murderer has been on the loose for years.

When a street kid turns up dead on the dockside Leary is convinced that the young runaway was tortured to death by other kids and Sunny backs up his theory. The killing reminds Da Vinci of a tragedy in his past in which a police investigation proved fruitless. Determined not to let that happen in this case, Da Vinci pursues a suspect who may help him resolve whether police negligence was involved in the boy's death.

Da Vinci is back in the headlines when he calls for Vancouver City to set up a red light district following the death of a high-priced escort, and the continuing mystery of the 28 missing prostitutes who are presumed dead.

The excavation for a water main turns up human bones. Kosmo takes up the challenge of piecing together the puzzle of Vancouver's 28 missing prostitutes.

The death of a child always hits hard for those who have to investigate, especially when it looks like suicide. Da Vinci tries to rein in a community on a quest to publicly expose a suspect.

The police catch a man with a sex-trade worker bound and gagged in his truck. Da Vinci questions whether this was a consensual act or the work of a man who has killed before.

In this real-time episode, a hit and run in an alley on the downtown Eastside and a shooting at a convenience store put Da Vinci, Shannon and Leary in a high-pressure situation.

After a downtown Eastside activist is found dead, Da Vinci is approached by a witness who last saw the victim getting into a police cruiser. A woman is found dead in a dumpster with no signs of what killed her. Kosmo and Winston investigate.

Da Vinci investigates the death of a man who was crushed by a parking-garage door. Meanwhile, Shannon and Leary search for suspects involved in a suspicious death.

Following a rash of fatal drug overdoses, Da Vinci learns that one of the dead addicts had an infant, who is missing. Manny, a police informer leads Leary, with new partner Angela Kosmo, to the woman's drug dealers. They arrest Todd and Sioux, and through them Larry discovers that the killer heroin came from a French-Canadian supplier who, along with his partner, was murdered, gang-execution style, just days previously.

Da Vinci is back in the headlines when he calls for Vancouver City to set up a red light district following the death of a high-priced escort, and the continuing mystery of the 28 missing prostitutes who are presumed dead.

Da Vinci has to untangle the truth of two fatalities that happened during a controversial high-speed police car chase. Shannon and Leary try to solve that the hold up of an armoured car.

A fishing boat goes down in calm seas and three men with more than a century of experience die. Da Vinci, who is coping with his own grief, must navigate his way through the secrets of a grieving family, a stonewalling corporation and his own sympathies to find the truth.

A police shooting is always a complicated, politically charged matter. Da Vinci convenes a Coroner's Court to investigate, and untangle the web of conflicting evidence, some of it presented by his closest colleagues

When a baby dies from a brain injury, pathology turns up a lot of unanswered questions. Da Vinci is on the case. The police investigate a possible drug-related shooting.

When a dead woman is found floating at sea in a small boat, Da Vinci is called in to investigate. Shannon and Leary probe the disappearance of a young pregnant woman.