Plumbers, mechanics, construction crews - their talent means nothing without the all-important tools that come to life in their hands. And when you're a demolition expert, airplane builder, or emergency responder, the tools in your arsenal are vital to getting the job done. Whether the stakes are a billion-dollar real estate deal or a single precious life, these are the tools that save the day - and the people who make it happen. We will meet a variety of people who work that job and check out their favourite tools, whether it's a kind of welder or wrench. Also we discover the fascinating evolution of these tools of the trade - who knew that the ingredients of explosive black powder used to be extracted from animal waste?