Master criminal Lesley Fisher becomes involved in a vicious underworld vendetta. Police investigations lead to a surprising result.

Ray Hubbard is studying to get through university, but when his girlfriend becomes pregnant the only solution seems to be an abortion. When things don't go as planned, the Yarra Central police find themselves investigating a con-man, a robbery and a backyard abortionist.

Two men and a woman comprise a gang of thieves stealing cash from retailers in the fruit and vegetable trade. Yarra Central police find their investigations made difficult by changes in tactics of the gang responsible.

A night club comedian faces a personal crisis when his broken marriage catches up with him after 14 years in the shape of his 18-year-old daughter. Yarra Central police help sort it out while investigating a call-girl racket and a large liquor theft.

Some attitudes towards Aboriginals are re-evaluated when 'Lefty' Cooper, an Aboriginal contender for the lightweight boxing championship, becomes the target for a crooked bookmaker who stands to lose a great deal of money if 'Lefty' wins the fight.

The Yarra Central police are faced with an outbreak of well-planned thefts with no recovery of the stolen goods. Third-rate thieves commit skilful offences under the instructions of a master-mind of unknown identity, referred to as 'Mr. Fifty Percent'.

A confidence trickster tells the Yarra Central police that a young English migrant is planning a bank robbery. The plight of an elderly lady complicates the situation.

Doreen Walsh, wife of a former detective, claims that she has been attacked and raped by three men. During investigations, Sen. Det. Banner and Det. Sgt. Vickers uncover an unusual story.

Herb Doherty, who has a string of minor convictions to his name and is known as a trouble-maker, witnesses a smash-and-grab raid. He also falls in love with Policewoman Margaret Stewart.

A cruel swindle is played on the local Italian community, and the police investigation impacts on a domestic crisis with Sgt. Vickers and his student son Jamie.

Yarra Central police launch an intensive search when Constable Kevin Dwyer disappears while pursuing a car following a series of baffling robberies.

During an investigation into the violent and apparently senseless desecration of a Catholic church, Yarra Central police track down a young man who has become embittered towards religion, mainly as a result of a 'fire and brimstone' indoctrination as a child. They are assisted on the case by a highly unconventional priest.

Mrs. Maguire is a successful business woman and charity worker. However, a street accident leads to a complex investigation into the truth about Mrs. Maguire and her daughter.

While investigating three assaults on a young girl, Yarra Central police are faced with several other problems, including the disappearance of a small-time criminal wanted for questioning and the defiant attitude of a stubborn old lady.

Alf Clark and his pregnant wife Jill are in partnership with her idealistic brother in a counterfeiting racket. Problems occur when they become involved with petty criminal Ted Jamieson.

A local art festival uncovers a raft of problems for the police of Yarra Central. At the centre of the trouble is Arthur Deakin; a poet, an alcoholic and a house-breaker.

A man becomes rebellious when questioned about his driving, taking a stand on principle against what he sees as an injustice. The Yarra Central police become the centre of attention when newspapers get hold of the story and run with it.

Investigations into a series of safe breakings uncover an unexpected romantic but illegal entanglement when police discover a man with two wives.

Yarra Central police contend with a bank hold-up and a bizarre confidence trick involving the freezing of dead bodies. Suspicion for both crimes centres on the much loved son of a family.

While serving a short sentence for theft, young and impressionable Malcolm Tanner formed a hero-worshipping friendship with his tough, ruthless cellmate Ernie Callan. After serving his sentence, Tanner is overjoyed when Callan offers to come and live with Tanner and his family while continuing his life of crime. However, joy turns to tragedy when it is learned that the police are hunting his mate, not only because of his criminal activities, but because he is a carrier of a deadly strain of smallpox.

Yarra Central police face a crime following a 20-year-old pattern. Investigations lead them to master criminal 'Chalky' Gunnerson, who is a clever chess player and plans his moves against the police with care and precision. Also involved are his daughter Vivienne and a rather brash young apprentice, Ricky Bevan.

John Anderson, a neurotic young camera enthusiast, unwittingly becomes a key figure in a police search for a couple of jewel thieves.

Yarra Central police investigate threatening letters and attempts to injure a leading professional jockey.

A young girl, Tina Findlay, is caught shoplifting, and Policewoman Margaret Stewart probes her background to find a reason why. Trying to help Tina proves difficult and unrewarding when she becomes mixed-up with hardened criminal Max Gillies.

Yarra Central police, who rely heavily on radio communication with D-24, face problems when two criminals steal a police radio.