Trainee tree man Tomas gets the fear halfway up a redwood, Erik dives deep into the sea for research samples, and rookie volcanologist Sarah scales an active volcano. S1/Ep5
Rookie diver Erik struggles underwater while rigging a sunken yacht and tree man, Nate, drops a large dead Eucalyptus tree nicknamed the Widowmaker. S1/Ep4
Hoping for a job as a commercial diver, Erik welds a patch on a sunken submarine. Plus, a heavy haul driver battles through a hurricane, and a bush pilot is hospitalized. S1/Ep3
A rookie climber ignores advice to scale a redwood, some guys attempt a risky underwater welding job in San Diego, and an amateur pilot goes canyon flying. S1/Ep2
A raw caver leads for the first time, rookies attempt to join the Sonoma Marin Tree Men, and a novice flyer travels to Africa to take a rigorous bush pilot course. S1/Ep1