Teaming up with sniffer dogs to uncover hidden stashes of illegal tobacco, Billy helps catch a notorious poacher, and joins the City of London Fraud Squad in a raid on a counterfeit luxury fashion ring. Along the way, he meets a local hero teaching.

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Staffordshire Police carries out a series of raids targeting illegal cannabis farms hidden in suburban homes. As they dismantle dangerous operations and confront suspects, Billy also meets a reformed drug user turned mentor and sees how seized.
Billy partners with Cheshire Police as they utilize facial recognition technology and artificial intelligence to identify shoplifting suspects; he observes a business owner who operates a private surveillance system to monitor her property and assists Thames Valley Police in their search for an individual suspected of being a rogue trader.
North Yorkshire Police launch daring dawn raids to take down ruthless organised drug gangs terrorising local communities; Billy also follows the Welsh Environment Agency's high-tech fight against illegal fly tipping.
The Midlands Illegal Money Lending team prepares for a surprise raid on a notorious loan shark preying on vulnerable people, with Billy joining the operation. Council officers hunt rogue landlords, and the Environment Agency tackles an illegal waste.