Summary: A man is discovered tortured and executed on remote wasteland, and the team investigate, discovering that the victim was a hit-man. Soon their enquiries lead them to a local entrepreneur who they believe may have criminal connections. But they also have other concerns as Burke is caught in the wrong place at the wrong time, and Chief Superintendent Henson has marked him as a troublemaker, and she is determined to make sure his days in the police are numbered.

Summary: Murder strikes close to home for the team when DCI Matt Burke's elderly father is found dead in suspicious circumstances. What appears to be a straightforward case of liver failure takes a sinister turn when it is discovered that Andrew Burke died of a heroin overdose. Against police regulations, DCI Burke is determined to solve the case.

Summary: A mutilated body is discovered by some standing stones on a remote island. Ross and Reid travel to the island to investigate, but find the inhabitants to be wary of outsiders and seemingly reluctant to assist. Returning to Glasgow with the body, Burke and Fraser make some headway and manage to connect the victim to a South American drugs racket.

Summary: The body of a hitman who has been tortured and executed is found on wasteland. Burke's old flame, who left him at the altar decades ago, is now a political consultant. She asks him to make a back-channel investigation into her primary client, an MSP. Burke gets embroiled in a side investigation with links to the gangland murder.

Summary: When a college principal is crushed to death in a lift, the preliminary investigation into his death discovers that the lift mechanism was deliberately sabotaged, and the finger of suspicion points to the dead man's wife, who may have avenged herself over his adultery. But DI Ross believes that the deputy principal has a hand in the murder, and sets out to prove the man's guilt.

Summary: The body of a private investigator is discovered at the bottom of a local quarry. After learning from the victim's fiancee that he was working on the case of a missing woman, and had claimed to have found her, the team become convinced his investigation is the key to solving the murder.

Summary: A female campaigner for domestic violence is found battered to death in an alleyway. During the course of the investigation, the men, that the campaigner was pursuing, enter the frame. But the real culprit is lying in plain sight.

Summary: A young woman is found dead in her bath after a week. But which side of her shady life led to her murder? Meanwhile Robbie's personal life takes an unexpected upsetting turn.

Summary: Is there a darker and politically motivated scheme at work behind the hit-like murders of two Polish migrants, a construction site's security guard and a luxury hotel's receptionist, and a petrol bomb attack against a lawyer of Polish origin? Or is someone laying a smokescreen across the team's path? The truth turns out to be unexpectedly much closer to home.

Summary: When a disused coal pit is excavated to re-open as a mining museum, two corpses are found, belonging to a young married couple who disappeared twenty-four years earlier, seemingly to escape rent arrears, though none of the neighbours are forthcoming and Jackie, who grew up in the area, is angry with them. More deaths occur before a secret stretching back to the days of the miners' strikes is exposed

Summary: A volunteer at a suicide hotline is murdered, with the murder staged to look like a suicide. Jackie is the target of a stalker. Eventually, it turns out the two cases are linked with two other murders.