Sewermen

It's a bug's life for as Steve and Anthony discover a whole new colony of wildlife. In the Lake District, an army of engineers with a battery of machinery are constructing one of Britain's biggest fresh water pipelines.

Steve and Michael tackle a fatberg the size of four jumbo jets, while Mick and John try to stop a sewage leak from ruining Passover. Teams of on-the-road engineers work tirelessly to unplug and clean up the 25,000 blockages in the North West.

A Warrington water main has burst, flooding roads and causing 17,000 taps to run dry. Meanwhile, in the heart of Liverpool's docklands, veteran sewermen Steve and Michael continue the battle of the fatbergs.

Following the everyday heroes who who keep Britain's water systems flowing free. There are three weeks to clean an effluent-encrusted sewer beneath a golf course.

A fire-fighting helicopter is chartered to stop a wildfire on the West Yorkshire moorlands reaching a reservoir.

Specialist divers battle low visibility and marine debris to clean a massive submerged outfall pipe.