In Philadelphia, Mike Davidson is on streets, in tunnels, on tracks and in trolley restoration garages - working shoulder-to-shoulder with the team that keeps one of America's largest and oldest mass transit systems running smoothly.

Mike Davidson goes to the biggest automated package sorting facility in the world - UPS Worldport in Louisville, Kentucky. Two million packages go through here every day.

Snowbird Ski battles to reduce the risk resulting from high snow levels and deadly avalanches.

A cross-country mission to cap the US’s estimated two million toxic, abandoned oil and gas wells.

Mike travels to San Diego to learn how U.S. Marines operate, maintain and repair the CH-53E Super Stallion, a heavy-lift helicopter that's been in use since the early 1980s.

The worldwide pandemic ceased operations on the world's only underwater habitat. Mike Davidson joins a crack repair crew as they dive in to bring it back to life and get NASA astronauts back inside for training.

Host Mike Davidson goes to the remote Atacama desert in Chile and to one of the most incredible and complex observatories on Earth - ALMA. He works alongside ALMA's expert team as they repair some of the world's biggest antennas.

In Brazil, lowered reservoirs plus an increase in population have stretched the nation's power supply thin. The solution: a floating electrical plant on the Atlantic Ocean made up of powerships hooked to a massive regasification unit. Once construction is completed, the ships will be able to generate, convert, and shoot enough electricity to power two million homes. But the checklist is long, and the weather is pushing back. It will take the hard-hat heroes all their muscle and engineering expertise to get the job done on time and on budget.