Walker's obsession with convicting the Bilkin family irks Connor, who questions the purpose of the investigation. Jamie enlightens Connor with information about the romantic life of Barry Bilkin, intensifying speculation about the family and its emerging issues.
When a jewelry robbery goes awry, the notorious Bilkin family is put on trial for murder. After Satchel bungles his testimony, he must deal with Walker's frustration and the intense scrutiny placed on his personal life.
The arrest of Pavel yields unsatisfactory results, forcing Walker and Connor to continue searching for the motives behind the growing number of crimes. As they do, the line between criminal and victim blurs.
A teenager's fatal fall from a Ferris wheel initially seems to be an unfortunate accident. DCI Connor quickly realizes that to uncover the muddled truth behind the death, she must confront the carnival's mystic owners, including Satchel's fortune-telling aunt, Tess.
Walker forces DCI Connor to team up with McGill and his squad in the hopes of expediting the murder investigation. Connor's earlier mistake ratchets up the tension as the unit races to anticipate Imogen's actions.
It seems inevitable that Andy and Darren will be found guilty of murder, until all participants in the trial are profoundly affected by a single event. Detective Walker must wade through the implications of the incident while also confronting a great struggle involving his own son.
The discovery of 19-year-old Maria Cole's mud-covered corpse sends Walker and Connor searching for answers. Armed with sparse evidence, the detective duo clashes with a key murder suspect's father--who will take any means, legal or not, to keep his son free.
The diary of one of the missing women indicates a new suspect in the case. The journal entries' authenticity falls into question, and the seeming dead end leads to the threat of a new murder. Video evidence sets Walker on a course with a deadly conclusion
On leave in Glasgow, Walker is drawn into the search for an old friend's missing sister. He also investigates the disappearance of a woman's daughter, only to find that both women were married, at different times, to the same man: Kevin Reid.
Ex-con Terry Dyer maintains his innocence even upon release, but the angry father of his alleged victim seeks revenge and wounds him. Violence brings Walker and Connor onto the case and a new suspect and motive come to light in the 12-year-old crime.
With no available suspects, the investigation delves more deeply into the victim's personal affairs. Details emerge about Dr. Carlisle's darker secret life that change the team's focus. The girl's death on the operating table may be crucial to the case.
Walker's friend Dr. Carlisle, a pediatric surgeon, is killed. Walker learns that Carlisle had taken out a restraining order on the father of a young girl who had died in his care. The suspect vanishes and Walker chases, leading to a tense confrontation.
Malikov brings assault charges against Maryna, Sofia's sister, who claims it was self-defense. This only intensifies Walker's obsession with Malikov and Sofia's death. DCI Connor doubts Malikov's guilt and steers the investigation in a new direction.
A small fortune in missing jewels at a murder scene suggests a botched burglary. The victims' wealth and status--a police commander and his magistrate wife--put added pressure on Walker and Connor to find the perpetrator, fast. But as the police probe the family's unsavory secrets, Connor's suspicions fall on the couple's sons, despite their apparently airtight alibi.
Harried single mom Suzy MacDonald returns home from a business trip to find her precious 18-month-old daughter dead in her crib. Connor and Walker focus their attention on the recently hired nanny, who has vanished with Suzy's car. But the mysterious lady proves particularly adept at covering her tracks.