Bodies of young women are found strangled across Glasgow; a woman's remains are found under the floorboards of a house; and an opera singer becomes the prime suspect in a murder case.
The discovery of a woman's severed leg sparks a murder inquiry; and a wealthy land-owner's wife is strangled just before she is due to travel to Switzerland.
The detectives investigate a failed rape attempt by a masked attacker; a charred corpse seems to reveal evidence of black magic; and the team discovers a man was already dead before his wife shot him.
The team looks into the suspicious death of a member of a church youth club; a prominent loan shark is murdered; and when the body of a woman is discovered in woodland, the evidence points to suicide.
The detectives investigate a series of killings linked to a cache of explosives; a body is dredged from the bottom of the Clyde; and a by-election candidate campaigning for the return of capital punishment is murdered.
The team links the killing of a gypsy woman near Glasgow to a policeman stabbed in London during a jewel robbery; a pensioner is found murdered; and a body is discovered in a car that has just been through a crusher.
The body of an undertaker is found in a burnt-out car; two skulls are found during the construction of a new bypass; and the team is drawn into a suicide case where all is not as it seems.
Jim tries to defend a childhood friend when a series of shootings puts him in the frame for murder; the team investigates a number of murders linked to a calculated killer known as the Mechanic; and Jim is convinced the glamorous owner of a health farm is guilty of murdering her husband's mistress.
The wife of a sergeant is murdered while her husband is on duty; a man's last answerphone message hampers the police's investigation into his murder; and Jim's daughter is implicated in a murder case.
The police fail to get a witness to court to testify against his former boss, one of Glasgow's most powerful gang leaders; the team investigates dubious goings-on at a fertility clinic; and a Scottish writer who has made his name in Hollywood receives a death threat.
Jim is assigned to investigate the death of a satanist; Jim is promoted to acting superintendent but does not appreciate the extra responsibility; and a stage hypnotist is suspected of using his powers to murder by remote control.
The team investigates the death of a 1960s rock star who was about to stage a comeback; a murder suspect goes missing; and a killer targets Glasgow's gay community.
Jardine and Reid look into the murder of a crook who masterminded the theft of a fortune in bullion 15 years previously; the team investigates a series of murders committed by a killer obsessed with the biblical plagues of Egypt; and a body-building drug proves deadly.
The team investigates the apparently motiveless murder of a businessman; three teachers at an exclusive boarding school are killed in unusual circumstances; and a hunt is on for the killer of a young woman.
Jardine and Reid search for a link in a murder case; and the team tries to protect a murderer from the attentions of a vigilante.
An audacious killer taunts the members of Glasgow CID by bumping off the owner of the hotel where their annual dinner is being held; Jardine receives help from an unexpected source during his investigation into a girl's mysterious death; and an apparently motiveless murder is investigated.
An investigation into the murder of a CID officer uncovers a hidden world of police corruption; a man is found dead at a health farm; and members of a broadcaster's entourage are picked off one by one.
An ambitious politician's hopes of clinching a multi-million-pound investment deal are jeopardised by angry protesters; a body is discovered in the burnt-out basement of a Glasgow factory; and the body of a prostitute is found in a river.
A man's mangled body is found in a Clydeside shipyard; the murder of a nurse appears to be a straightforward crime of passion until the team discovers the victim has been leading a secret life; and a boxing promoter is found murdered with his mouth stuffed full of money.
A famous novelist is found dead in an alley the morning after a book launch; a recently released prisoner is suspected of murdering a witness whose testimony put him behind bars; and a farmer dies in a suspicious fire.
DCI Burke's career hangs in the balance when a man's body is found behind the wheel of his car; a case from the past returns to haunt Ross; and a serial killer appears to be on the loose.
Burke is left fighting for his life after being shot; Burke tackles a copycat killing inspired by a murder committed 20 years previously; and Robbie Ross goes undercover in a bid to restore his reputation following a disappointing appraisal.
The team investigates an illegal betting syndicate at a stable; Burke suspects a retired policeman of being involved in the murder of an ex-convict; and an activist is found murdered in her tenement flat.
Burke's father is found dead in suspicious circumstances; a mutilated body is discovered on a remote island; and Burke puts his reputation on the line to help an old flame working for a politician who is in trouble for accepting funds from an underworld figure.
A campaigner against domestic violence is murdered; a Polish man is killed on the building site where he worked as a security guard; and two long-dead bodies are found in a disused coal mine.
The murder of a gambler at a greyhound track leads the team into an investigation about sex tapes; a body is found hanging in a children's playground; and a father and son are murdered with copies of the Bible at their sides.