While attending an online forensic course, young lab assistant discovers that the fictitious case study has a link to her past. With the help of two female professors she works on bringing a killer to justice.
Episode 1Emma is now training as a forensic chemist - and on the cusp of seeing her mother's murder case finally solved, while Daniel has returned to Dundee to give evidence against Phil.
Episode 2
E2
Episode 2A second explosion puts pressure on McKinven and Sarah to find and stop the bomber. As Phil's murder trial continues, both Daniel and Emma are feeling the strain.
Episode 3
E3
Episode 3The task facing McKinven is ever more daunting, especially now that his wife Azra is joining the investigation.
Episode 4
E4
Episode 4Two suspects derail the investigation as McKinven and Sarah are consumed by their feelings. Kathy's inability to communicate becomes a serious problem.
Episode 5
E5
Episode 5Another deadly explosion occurs. Sarah and McKinven's growing attachment has consequences, as Kathy suspects Jean the Dean of having a secret to hide.
Episode 6
E6
Episode 6Sarah works with McKinven to prevent another explosion before making decisions about their future. Kathy realises change is essential, personally and professionally.
