with 4 episodes premiered on April 16, 2018

with 4 episodes premiered on January 20, 2020

with 4 episodes premiered on September 28, 2021

with 4 episodes premiered on October 9, 2023

Series going inside the cordon with Gwent Police's dedicated forensic collision investigators, as they deal with serious incidents on the roads

with 8 episodes premiered on October 8, 2025