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

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

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

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...

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.

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.