An army of engineers in the Lake District are constructing one of the UK's largest fresh water pipelines. It's a bug's life for Steve and Anthony, as they discover a whole new colony of wildlife feasting off unmentionables.
In Liverpool, Steve and Michael tackle a stubborn fatberg that is the size of four jumbo jets. Mick and John try to stop a sewage leak from ruining Passover.
Steve and Michael send newbie Dan to fight the fatberg. A Warrington water main has burst, flooding local roads and cutting off the water supply to 1000's of homes. Mick and John respond to Mrs Windsor's urgent manhole problem.
An effluent-encrusted sewer beneath a golf course must be cleaned. Denzil the sniffer dog detects a whiff of chlorine on the Welsh borders. A potential pollution problem must be fixed within 2 hours, or heavy fines will be incurred.
A fire-fighting helicopter must stop a wildfire reaching a reservoir. Repair works force half of the largest sewerage works in the north-west to close. Two neighbours have had a hard time trying to clear a blockage.
Specialist divers battle against low visibility and marine debris to clean a massive submerged outfall pipe which disperses treated waste water deep into the sea. A collapsed sewer puts a town's first public food fayre in doubt.
Stuart tackles a 200 metre fatberg in Manchester. Newly qualified "leak listener" Dan detects holes in the water company's network. The Steves attract donkey attention on a flooded farm.
Teams in Liverpool are faced with a seemingly unbeatable foe, a fatberg 350 metres long, weighing 400 tonnes and filling 40% of the main sewer in the docks. Steve and Kevin demonstrate the problems caused by wet wipes.
