Dangerous investigates when a man is found dead after a college reunion party. The prime suspect is a reformed drug addict with no alibi for the time of death.

The body of a murdered ex-soldier is found dumped on a rubbish heap. Davies has to find the killer, but struggles to break down the fierce loyalties of the victim's artillery regiment.

Davies uncovers a tragic tale of revenge, spurned talent and faded glory when he investigates the suspicious death of a faded, hard-drinking former rock star Teddy O'Connor, lead singer with 1970s Glam Rock boy band The Overnite Sensations.

Davies investigates the spectacular death of stock car driver Geoff Fallon, and discovers that the motive may lie closer to home than he cares to admit.

Davies is called in to investigate the suspicious death of wealthy artist Maurice Leyman, found dead after a fire in the studio in the garden of his luxury home. His wife is rather calm about the whole thing and has a dodgy alibi, but Dangerous is reluctant to point the finger at her.

Davies makes a gruesome discovery when he is called in to settle a dispute between neighbours over a leylandii hedge. The hapless detective is then called away to deal with a suspected suicide.

Davies decides to toughen up after falling victim to a cruel practical joke by colleagues Barrett and Pimlott. He is then dispatched to investigate the death of a medical researcher. It looks like suicide, but Davies is convinced it's murder.

Dangerous Davies is on the trail of the killer of an Albanian refugee, and his search leads him to a dating agency – where one of the clients is someone he knows only too well.

A disrespected but decent British detective unravels a cold case about a missing seventeen year old girl while trying to deal with the breakup of his marriage.

An older woman whose philandering husband has disappeared seems unduly unconcerned about his circumstances.

Davies is assigned to look after the victim of a vicious burglary, who believes the police aren't paying her enough attention. It soon becomes clear that she has a secret agenda, as Davies finds himself subject to the attentions of an obsessive woman.

Davies unravels the true identity of an old tramp found drowned in a canal.

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The 1981 movie starring Bernard Cribbins that tells the same story as the series pilot.