Police: Suspect No.1 - Season 4

In Grimsby, a vicious mass street brawl leaves innocent victims with serious injuries. Police are thrown into a desperate race against time to find before a suspect flees the country.

In Scunthorpe, a restaurant worker is stabbed in the neck with a pair of scissors in broad daylight before the attacker flees. Can police find and build a case against their suspect?

A man is viciously attacked on his doorstep with what appears to be a gun. Armed police arrest a gang of four for the terrifying assault. But but it's a race against time to prove they have the right men.

A household is terrorised at home by five masked men who break in and hold them at knifepoint before stealing their car. Can detectives find the violent gang before they strike again?

Humberside Police are facing a rise in crimes involving knives and offensive weapons. This edition follows three investigations, revealing tactics used to fight a rise in violent crime.

Lone female dog walkers and pedestrians in parkland are traumatised as a man exposes himself to them in broad daylight. But as detectives hunt the sexual predator, he strikes again.