Beyond The Line: North Wales's Traffic Cops Episode Rating Graph

Behind the scenes with the officers of the North Wales Roads Policing Unit, which covers almost 700 miles of road from the rural west to the built-up urban east. Enduring high-speed chases, anti-social behaviour and even violent attacks, these are the officers keeping the region safe.

A look at how officers of the North Wales Roads Policing Unit deal with issues surrounding young drivers, who make up 11 per cent of road users in the region but account for a quarter of all casualties on its highways and byways.

A look at how officers of the North Wales Roads Policing Unit deal with the dangers of the job and violent attacks on police officers.

The final episode takes a look at the dangers of high-speed pursuits and the mental strain of doing such a demanding job. Narrated by Eiry Thomas.