Four bodies - two adults and two children - were found shot in a house in an outer suburb of Canberra. Inside the house was evidence that would not only lead investigators to the killer, but would uncover a secret buried for years. Could a car crash, which had taken the lives of two other members of the same family, been no accident at all?

A mother and her two children were found in their house brutally bashed to death. Was it a robbery gone wrong, or something far more sinister? A trail of evidence leads detectives to one shocking conclusion. The episode includes the police videotaped interview with the suspect.

Queensland Cat Protection Society president Kathleen Marshall is found brutally stabbed to death. In a case involving rumours, catfights and fortune telling, the detectives would rely on forensics and five tiny spots of blood to separate fact from fiction and point them towards the killer.

When Andrew Atsbury went missing, police first thought he may have commited suicide. But after discovering a vital piece of evidence which was previously invisible, they knew it was murder. But where was the body? With new age forensics and old fashioned foot work, a man who had been trusted in the past would become their prime suspect. His interview with police is included in this episode.

When a young girl's body is found in a park in the teeming rain, the police had the odds stacked against them. They would need to call on all their investigative and forensic skills to solve a series of murders that even today sends a chill down the spines of those who lived through it. This episode details the capture of serial killer Paul Denyer and features his cold and calculating confession.

When a skull is found protruding from a sand embankment of a beach, police have their suspicions that the victim is a criminal who had been missing for some 12 years. This area had always been suspected as a dumping ground for underworld killings, yet detectives would rely on forensics to prove their hunch. How Task Force Snowy nabbed the infamous Arthur "Neddy" Smith.

A taxi driver is murdered and, a month later, a human torso is washed up on a shore. Both murders are seemingly unrelated, yet DNA and an observant public would lead detective to the "bow and arrow" killer. Richard Leonard's chilling confession is included in this episode.

In 1998, the brutal deaths of shopkeeper David O'Hearn and Lord Mayor Frank Arkell led to the city of Wollongong, New South Wales being gripped in fear. This episode shows how the tireless work of detectives and some scientific procedures helped to solve this bizarre series of murders.

A young man has confessed to the murders of shopkeeper David O'Hearn and Lord Mayor Frank Arkell, but the subsequent police investigation takes a bizarre turn when the man's father is murdered in similar circumstances.

A note left on a police car and an emergency phone call lead police to find the body of a young woman hidden in bushes out the front of an unused Adelaide police patrol station. Each was a vital clue, yet it would take the disappearance and murder of a Japanese student to capture the killer.