

Diving into retrofits on the world's only underwater habitat, where NASA astronauts train for space missions; Mike joins a crack repair team who breathe new life into this oceanic environment after a global pandemic shut it down.

In Southern California, crews rebuild after the 2025 wildfires, cutting firebreaks, repairing emergency water systems, hardening roads and power lines and building fire-resistant homes before the next firestorm.

Mike helps fix the vessels that the U.S. Coast Guard use to keep the oceans safe; he replaces key parts of ship engines, removes a large crane from a buoy tender, and fixes a helicopter for a critical exercise.

Mike Davidson heads to Brazil, where an offshore crew is racing the clock to set up giant power ships to deliver electricity to a country in desperate need.

In the Mojave Desert, crews prepare Roc, the world's largest airplane, for a tandem flight with a 747 by repairing its wing, inspecting landing gear and engines and training chase pilots for the mission.

Witness wild weather, emergency landings, and animal invaders at Ted Stevens International Airport in Anchorage, Alaska, one of the world's busiest cargo airports.

In 1991, a Boeing 737 operating as United Airlines Flight 585 suddenly rolls into a dive and crashes within eight seconds, killing all 25 people on board.

When Germanwings Flight 9525 crashes in the French Alps, investigators discover shocking truths about the co-pilot's mental health.