At Victoria coach station in London, officers are on the lookout for coach drivers who are driving when they are too tired. We hear from the mum of 23-year-old Nathan Reeves, who was killed when the vehicle he was travelling in was hit by a coach whose driver is thought to have fallen asleep at the wheel. They also track down two fraudsters running a sim swap scam and stealing almost half a million pounds from victim's bank accounts, and we find out about the new thermal imaging technology being used in Oxford to spot garden sheds that are being rented out illegally as homes.

Officers bust a tenant making over £100,000 unlawfully sub-letting his council flat in London. They take down a criminal gang running a multi-million-pound diesel fraud. The gang has been contaminating diesel with cheaper products, which is saving them millions of pounds in tax and costing unsuspecting motorists thousands of pounds in engine repairs. And they help rescue over 150 dogs being kept in squalid conditions at an animal centre in Lincolnshire.