Dr Sam Ryan investigates her first case as a police consultant - a tragic case involving the death of a child.

The murder investigation continues and someone breaks into Sam's house. Undeterred, she continues her search for the truth.

When Mark James's decomposing body is discovered, it bears all the signs of a ritualistic killing.

The police grow frustrated with the lack of a forensic link, but Sam finds more clues in an old case.

The death of a man in custody seems like a straightforward case, but DS Farmer has concerns about some of her officers.

Someone is harassing Sam as evidence of a cover-up mounts, and the bomb squad is called in to deal with a mysterious parcel.

Tragedy strikes after a student asks Sam for advice over her arranged marriage, and then sees her family torn apart.

Sam tries to persuade her student to reveal where her father is hiding. The tragedy spreads beyond the family, and even the team may be in danger.

A boxer dies from brain injuries mid-bout. A new DSI takes over the team's investigations. Sam and Wyn bury their mother.

Sam discovers why Kevin entered a bare knuckle fight, as well as uncovering evidence of more foul play in the boxing circuit.

Stuart Evans is in the advanced stages of Aids when he dies, and his body is donated to science. However a routine toxicology test reveals foul play was at work.

The police make an arrest, but do they have the right suspect? Sam pursues her own line of investigation.

The murder of a married woman who was having an affair seems straightforward. Friction develops between Dr Ryan and the police when the evidence complicates their case.

The murderer makes a direct threat against Sam's life after she uncovers the evidence needed to identify them.

The police suspect a violent alcoholic of the murder of an elderly woman. Sam clashes with the police when she refuses to support their case.

Sam's pursuit of her own theories leads her into dangerous places, both personally and professionally.

Sam must investigate a case with a painful personal connection when a close friend is murdered after the Cambridge May Ball.

The case becomes entangled in Annabelle's romantic relationships when Sam discovers her friend may have had an affair with a student.

A young woman is found dead in an empty house. Why was she there? Sam suspects another person was involved.

The hunt is on for Mr Harris, but the murderer may be closer to home. Meanwhile, Sam grows closer to surgeon James Reynolds.

A tragic scene is discovered when a young mother apparently dies of an overdose. When another addict dies in an explosion, Sam has a bigger case on her hands.

Are the deaths linked to a drug war or is this the work of vigilantes? Sam suspects a personal tragedy is at the heart of things.

The death of a farmer involving a combine harvester seems like an accident - until Sam receives an anonymous tip-off.

Sam looks for connections between Ian Neal and a killing in Northern Ireland in 1985. Meanwhile DI Connor's wife arrives in Cambridge.