Duncan disorderly?

The final episode of the crime drama sees DI Perez in an impossible position, as his personal and professional lives crash into one another. With DNA evidence suggesting it’s possible Duncan was involved in the murders of Lizzie Kilmuir and/or Sally Mccoll, Perez is forced to bring him in for questioning. And while Duncan is aghast to be accused of such a crime – and Cassie doesn’t want to believe her birth father could be a killer – Perez is sure Duncan is hiding something.

However, there may still be a ray of hope for Duncan as an old photo of Sally’s puts things into a different perspective, and suggests a new suspect for the murder investigation – but things get disrupted when angry Malone seeks revenge.