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 ...

Rookie diver Erik struggles underwater while rigging a sunken yacht. Heavy Haul trucker, Fred attempts to transport a 105-ton crane through a hurricane. And tree man, Nat ...

Hoping for a job as a commercial diver, Erik welds a patch on a sunken submarine. Three lessons into his bush pilot training, Ron ends up in a hospital. ...

A rookie tree climber jeopardizes his team when he ignores expert advice about scaling a redwood. Dan and Erik attempt a dangerous underwater welding job in San Diego. Am ...