A burglar, Jennings, breaks into the weekend beach house of Dr. Tarling, and trips over his body. Detectives question three suspects - the victim's son, his medical partner, and Jennings.

Rosalind Eyre's landlady enters her room and finds her in bed, dead from suffocation. Homicide detectives establish that she has been murdered, and suspicion falls on fellow boarders.

A chemist is found shot dead in Geelong, and police search for a man with cuts on his face. They believe two men and a woman can identify the killer, but all three deny ever having seen him. Detectives then discover that a man involved in the case, Major Dymond, has been posing as his late brother.

Fragments of a plastic pistol-grip provide a major clue for detectives after a housewife is shot at and brutally attacked in her home.

Upcoming young pop star Annette Bishop is abducted and her chauffeur, Bob Wilson, is shot. The abductors, Danny Clark and Ted Randle, are demanding a ransom, and it transpires that the girl's mother, Sandra Bishop, is in league with them. Later the girl's father, ex-prisoner Des Bishop, muscles in on the act, but at this stage it looks as if Annette has died from an overdose of sedatives.

A grocer's assistant deliverers an order to two elderly women at their home and is horrified to find they have been murdered. Searching for clues, Homicide detectives are astonished when they discover large amounts of money and jewellery hidden in the house.

David Hamilton, an incurably ill man, dies suddenly from an overdose of sleeping pills. Homicide detectives try to establish whether it was suicide or murder, and investigations lead them to the Flemington racecourse.

A happy afternoon in the park comes to a tragic end for 12-year-old Bronwyn Thompson when she is attacked and murdered. A pair of glasses provide detectives with an important clue.

Anna Milich is strangled, and the main suspect is her boyfriend, airline pilot Frank Mason. During questioning, Mason unfolds his unusual affair with Anna to detectives in flashback.

When model Cassie King is murdered, Homicide detectives suspect that someone on the staff at the fashion house were she was employed could have had a good reason to kill her.

While sitting in their car near the beach, a young couple are threatened by a man with a gun. Trying to pacify the gunman, the boy is suddenly shot dead and the girl attacked and criminally assaulted.

A crime reporter seeking information about a drug pushing racket that he uncovered at a quiet beach resort meets a sudden death. Suspicion falls on two surfers who frequent the beach where the murder took place.

As a safe cracker, 'Squirrel' is a fast worker, but not fast enough to escape a warning bullet fired by police at the scene of a robbery. On the run, wounded and desperate, he finds an unexpected ally in tough-talking prostitute Rosie Cullen.

When Alan Taylor is murdered in the presence of his friend, blind man Harry Cooper, detectives are convinced the killer was known to Taylor. But what puzzles them is why the blind man claims he heard nothing at all.

A wealthy businessman is savagely attacked and robbed after taking out an attractive girl he met at a hotel. Detectives suspect that confidence tricksters are responsible.

Norman Kemp attacks his wife in a drunken stupor, and his son Donald - a former delinquent - tries to protect her. Threatened by his father, he hits him in self-defence. He panics, thinking police will suspect him of both attacks.

Eddie Chapman's wife is found murdered on a cliff-top. Police suspect Eddie, as does his sister-in-law Sally Partridge. Detectives can't prove anything until a gold necklace brings to light the real murderer.

A walk along a rocky beach ends in a sudden and violent death for a young art student. Her strangled body is discovered by fitness fanatic David Grierson, who saw an Italian youth near the scene of the crime.

When the body of public relations consultant David Armstrong is found at the bottom of a quarry, detectives suspect that his death is mysteriously linked with an affair he was having with an older woman.

When gambler Mike Harris is told by police that an ex-prisoner has threatened to kill him, he refuses protection. He later has a greater problem involving him with the police, an attractive young girl, and a doctor who has been struck off the register.

A group of pensioners in an old people's home are secretly engaged in earning extra money to supplement their pensions. When one of their number, Charlie Cook, is found dead, they dispose of the body for fear that a police investigation would expose their activities and land them in trouble with the Taxation Department.

A small girl is shot by mistake when jail escapee Frank Jackson tries to kill her father - Det. Bob Cozens of C.I.B. Homicide detectives question Jackson's grandmother hoping that, for his own good, she will lead them to her grandson's hideout.

William 'Bull' Madigan, the hated boss of a sawmill in a small company town, is shot dead and the local people are reluctant to give any information. The case ends tragically when Det. Costello is killed in a mine cave-in while trying to rescue a suspect.

Sen. Det. Patterson joins the Homicide squad in an extensive manhunt for jail escapees Reynolds and O'Byrne. They shoot dead a prison warder, steal a car, hide out and later rob a bank.

Mechanic Harry Stone is a much disliked practical joker. He is killed when someone releases the jack as he works under a truck.

Det. Sgt. Mackay's holiday in the bush is interrupted when he recognizes a former criminal in the district. He tells local constable Bob Mason, but when Mason is later shot after a bank hold up, Mackay has to prove that the criminal he recognized was involved.

During a practice session at Sandown race track, top racing driver Bob Wilkin is shot dead. Nobody heard the shot fired, and nobody saw the gunman. Homicide detectives have to sift through a maze of conflicting clues.

Det. Keith Harris from Adelaide poses as an international criminal to gather information on mysterious deaths involving a night club gang, led by Melbourne's 'Mr. Big' - a nightclub owner named Joe Butler. Butler disposes of his rivals by murder, but in each case the deaths appears to be accidental.

When Det. Sgt. Mackay flies to London to extradite a criminal, he is asked to work on another case involving the disappearance of James Cochrane, who was last known to be in Australia on business.

When Coroline Benedict falls to her death from a balcony after a violent argument with her husband, detectives re-enact the circumstances leading up to her death to establish whether it was suicide or murder.