For Homicide it's the beginning of their toughest investigation yet when tonight's murder mystery sparks an emotionally charged investigation when a dogfight between neighbours leads to the discovery of a buried secret.

Natalie Pierce's suicide leads the detectives on a mission to discover the connection between her and 7 house fires in 9 years all resulting in the deaths of children.

The body of bank robber Mick Booth is found in a crypt. He has been dead for a year, so who has been robbing banks acting just like him?

Jim Conway is returning to Australia to face charges for the murder of Suzanne Fendleton he asks Matt to deliver his mother a letter and when they are taking him to the station he throws himself in front of a lorry, killing himself. Matt delivers the letter and receives evidence that just may prove that Jim was innocent.

Sgt. Wolfe's God-daughter is found murdered and a link is found between her and several other missing teens. After speaking to one of them that returned home, they get a lead on the man who may be behind it all. Will they be able to stop him before he murders again?

A sporting reunion of the University Eleven results in tragedy when they end up one man down, leaving Homicide to investigate the crime. But does the murderer have more killings planned?

Everyone becomes a suspect when a baby dies at his first birthday party. Meanwhile, Claire comes back with a problem and only Duncan can help her. But will he risk his career to do it?

The Homicide squad are called in following a man killed by electric kamikaze. The case then takes an even more bizarre turn after the discovery of six urns, all filled with human ashes. Who was the deceased? A victim? Or a killer?

A family is slaughtered during dinner and their mansion ransacked. The sole survivor is the eldest son and heir - could he be a cold-hearted killer? For Simon, finding answers is complicated by the return of an old adversary.

Terry Jarvis does his utmost to get rid of Duncan from the homicide team as the rest of the team try to solve the death of an Iraqi boy apparently killed in a police pursuit.

A well-organized gang rob gold bullion from a warehouse and kill two security guards by sniper-fire. The case pits the homicide team with their hated armed robbery team.

A race against time is ignited when one of Homicide's own takes a hit on a routine call. Meanwhile, Waverley places Jennifer in a sticky ethical dilemma that could make or break her career.

The detectives continue to work on the case, will they find all the clues before another tragedy happens?

How do you catch a killer if he is already in prison? And how hard should you try to find him when the victim appears just as evil? Homicide takes a personal toll on one of the squad.