A rookie caver leads an expedition into a Tennessee cave; hopefuls compete for a position with the Sonoma Marin Tree Men; a novice flyer takes a bush pilot course.
No synopsis available.
Hoping for a job as a commercial diver, Erik welds a patch on a sunken submarine; Rookie heavy haul driver, Fred, battles through Hurricane Patricia; three lessons into his bush pilot training, Ron ends up in a hospital.
A rookie diver struggles underwater to rig a sunken yacht; a heavy haul trucker tries to transport a crane through a hurricane; a tree man fells a large, dead Eucalyptus tree.
A rookie tree man freezes in fear on a redwood; a diver collects research samples in the ocean; a volcanologist tries to scale an active volcano
Volcanologist Sarah's first expedition on an active volcano; Rookies Nate and Tomas face a difficult challenge; Greenhorn wind tech Mike scales a 120 foot wind turbine.
