Sean Riley helps out on a radioactive fix at a nuclear power plant. He's keeping one eye on the Geiger counter as the team installs a new hi-tech turbine.
Riley joins Aircraft on the Ground team at Charles de Gaulle Airport in Paris to fix a Boeing 767 that has damage to its pressure dome.
Riley joins the people who work on power lines while the electricity is still on.
Riley joins a commercial dive team in a midocean engine swap out on a huge deep-water construction vessel.
Riley joins engineers at the Paranal Observatory in Chile to move a 23-ton, $15 million mirror. If it's damaged, it will take six years to replace. No pressure then.
Riley joins a travelling daredevil act to fix a 2,000-foot-high TV tower with a faulty antenna.
Sean Riley
Self
Kathleen Cromley
Producer
John Mernit