In Norwich, a specialist team of detectives are battling to bring down 'county line' gangs, which are flooding the city with illegal drugs brought in from beyond the county borders.

Detectives are tasked with bringing down the Norfolk-based Lewis drugs gang, and in particular, the man at the top of it who oversees the selling and dealing of crack cocaine and heroin at street level.

During a lads' night out, an interaction with a stranger leads to a violent attack that leaves one of them fighting for his life in hospital. Can police track down the assailant?

When a man is found badly beaten on the side of a road with little recollection of what happened, Detective Sergeant Lee Marriner and Detective Constable Craig Weir must check all the available images to see if they can find any leads.

Detectives suspect that a series of burglaries targeting the elderly and vulnerable might be the work of one man. CID Inspector Tom Smith must see if he can take this dangerous man off the streets.

In a case of home invasion by three men wielding a baseball bat, a family is subjected to a violent ordeal, late at night, in their own home. Rushing to the scene, police officers discover they have no idea why they were attacked.

A vulnerable man in Hull is violently assaulted at home and left for dead after his attacker sets fire to the building. Police must act fast to bring their dangerous suspect to justice.

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.

Victims are terrorised in their home by a knife-wielding intruder, twice in 24 hours. The race is on for police to catch the hardened criminal and his accomplice before another strike.

The team in Norwich gathers evidence about a single-punch attack that has left a man with a serious brain injury, but no willing witnesses.

In a spate of terrifying shop robberies, the criminals brandish a meat cleaver and knife.

Two men are left with serious facial injuries after being assaulted in a Grimsby pub. Police arrive to make an arrest, but a large crowd of bystanders violently intervene...