The death of an investigative journalist throws the spotlight on to Sam Ryan. Nikki begins to realise that the implications of her discoveries will challenge the principles of forensic science.

Aiden Cheng, Aimée Kelly, Chris Anderson, David Leon, Gina Bramhill, Hugh Quarshie, Ian Puleston-Davies, Kevin Shen, Lloyd Everitt, Matthew Gravelle, Shireen Farkhoy