When your lights go out, high-voltage power line workers are the ones called in to fix things. It's one of the most dangerous jobs in the US, with access to the wires often only possible via helicopter - sometimes a mobile platform on the side of the chopper is used for teams to work from at high altitude.

Game capture is a lucrative business - and often recklessly dangerous. Specialist wranglers buy all the animals they can catch from one game reserve and then sell them on for large profits to another one. A large rhino can bring in 25,000 pounds, and a herd of zebras about the same: but first you have to track them down and trap them.

The Red Arrows are The RAF's least secret weapon. Their quest for excellence is such that they push their abilities and bodies to the limit. Flying at speeds of 500mph, in death-defying formations, there is no room for error.

Not surprisingly, most dive companies have seen tragedy. From hazardous materials to lakes, water towers to oil rigs, all need underwater maintenance and these brave men are the ones that put their lives on the line to do it.

Construction is one of the most dangerous industries in the world, with 1200 construction workers killed each year in America alone, and wind turbine construction is toughest job of all. These are the men who take on Mother Nature.

Logging is statistically one of the most dangerous jobs in the world. To find the toughest terrain - and the toughest men - we travel to Vancouver Island, Canada to meet some of the best loggers, tree climbers and heli-loggers on the planet.