Defenders: Busting the Bad Guys - Season 4

Trading Standards Officers investigate a multi-million-pound driving school after hundreds of learners are left out of pocket. Meanwhile, police close in on Covid fraudsters.

Officers crack down on a company fitting cars with fake pollution filters, and Trading Standards confront a company who claimed their insulating paint would cut home energy bills.

Officers take action against a cowboy builder who has conned several customers out of tens of thousands of pounds. And they're on the trail of a serial fly-tipper.

A special police unit investigates a cruel scam targeting the elderly, and investigators prosecute an estate agent for failing to tell buyers their new flat was a fire risk.

In West Yorkshire, a task force discovers text messages and videos in which a gang of cruel conmen mock their victims, many of whom are elderly and vulnerable.

Maidstone Borough Council are on the trail of a BMW driver caught on camera dumping bags of rubbish in a lay-by that has become a fly-tipping hotspot.

Health and safety officials investigate the death of a five-year-old girl following an incident at a playground. Trading Standards crack down on traders selling substandard face masks.

The Environment Agency responds to a major incident after several canisters containing a deadly chemical weapon, mustard gas, are dumped in a lake.

Officials investigate a fatal road traffic collision and get justice for a vicar who was tricked into paying tens of thousands of pounds to a cowboy builder.

The Maritime and Coastguard Agency investigates a collision involving a party boat on the River Thames, and trading standards officers put a stop to a dangerous medical scam.