As a spate of acid attacks across the UK make the headlines, officers go undercover to stop retailers selling acid to teenagers. In a 3am stop-and-search operation, police take to the streets around Birmingham to target vehicles carrying fake or potentially dangerous imported goods to car boot sales in the region. And officers catch up with mother-and-daughter letting agents in Cornwall who have pocketed a quarter of a million pounds of other people's money.

Officers crack down on illegal and dangerous vehicles putting our lives at risk. Marathon runner Allan Wood almost lost his life when he was mowed down by a vehicle that hadn't had an MOT for over three years and had no working brakes. They also discover an illegal puppy farm in Cannock that is putting profit ahead of care. Thirty dogs and two racoons have been kept in filthy conditions, some of them locked in old cars, with no water, food or proper ventilation. And a rogue kitchen trader that has swindled customers out of thousands of pounds is shut down.