Traces

Whilst Emma and Daniel prepare for the murder trial of his father, McKinven and Sarah are back together when a church hall is bombed, rocking Dundee.

The second bomb destroys a Vietnamese nail bar, killing two people. Now the pressure is really on, as Super Gav wants McKinven to find out what's motivating the person behind the attacks.

The task facing McKinven is ever more daunting, especially now that his wife Azra is joining the investigation. Meanwhile, Kathy's PhD student sees more than she should...

Two suspects derail the investigation as McKinven and Sarah are consumed by their feelings. Kathy's inability to communicate becomes a serious problem.

Another deadly explosion. Sarah and McKinven's growing attachment has fraught consequences, as Kathy suspects Jean the Dean of having a secret to hide.

Sarah works with McKinven to prevent another explosion before making decisions about their future. Kathy realises change is essential, personally and professionally.

A fatal fire in a nightclub proves an ominous omen for Emma's return to Dundee. Her mother's unsolved murder comes into sharp focus, forcing Emma to turn to her new boss, Sarah, for support.

Glad of McKinven's help, Emma soon feels overwhelmed by the police interest and wonders what she's started. But when the stars align to put Daniel in her path, Emma feels a deep connection.

McKinven's initial enquiries ruffle feathers and a furious Julie chides Emma for dragging up the past. When Skye threatens Emma with a knife, it's clear that someone's hiding something.

Daniel's facing a culpable homicide charge for the Secrets fire and wants to protect Phil's reputation. But when Emma meets Phil for the first time, her instinct tells her to be wary of him.

Emma's accusation against Phil drives a wedge between her and Daniel. McKinven urges Emma to stop sleuthing, as he becomes certain that the person who killed her mother is known to her.

While Kathy oversees the excavation of Marie's grave, Daniel gives McKinven the lead he needs to make an arrest. But it's the exacting forensic science that finally brings peace for Emma.