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.

Rookie tree man Tomas freezes in fear halfway up a redwood. Greenhorn diver Erik descends deep into the ocean to collect research samples. And rookie volcanologist Sarah attempts to scale an active volcano in order to land her dream job

Sarah continues her research on the volcano; Nate and Tomas work through a challenge together; Mike climbs a giant wind turbine.