Episode 1
In 1989, two bodies were found in Pembrokeshire - and the answers to their demise lay in the forensics, as a shocking truth was revealed.
Episode 2
When the body of eight-year-old Sarah Payne was found in 2000, police utilised the help of forensic scientists to catch her killer.
Episode 3
Carol Park's body was pulled from a lake more than 20 years after she vanished - and the key to solving the case lay in unique forensics.
Episode 4
Episode 5
Episode 6
Episode 7
Episode 8