Enforcement officers Dan and Jude are on the hunt for fly-tippers and rubbish dumpers blighting the beautiful countryside of the Malvern Hills, while Rob, Gary and John deal with the rivers of fat and wet wipes blocking London's sewers. In Wolverhampton, cleaners Jakob and Wojtek face a toxic clean-up thanks to someone storing 50 bottles of urine in a cupboard, while across the city a crime scene is in urgent need of a deep clean.

Enforcement officers Wayne and Dan continue their mission to identify the gang responsible for one of the biggest fly tips in Cardiff, more determined than ever to catch their prey. Environmental health officer Suzanne pays a visit to a takeaway restaurant in Worcester, and a London canal side is the scene of a battle between council enforcers and a waste-loving artist who has hoarded mountains of rubbish.