Diesel mechanic Quincey Walker guides the crews through a series of challenges that involve servicing automobiles.

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Part two of a special two hour season four premiere.

Crew members visit a plant nursery where attention to detail is key when building a complex planter box in the individual challenge.

Crew members compete in pairs to shrink wrap a large container, with the last couple to finish facing the overtime challenge where one person will be eliminated from the individual competition.

Season three competitor and carpenter Lamar Hanger returns to guide the crews through a series of construction challenges.

Savage Crew and Dirty Hands get tangled up in the team challenge when they must organize and load a 15,000-pound fishing net onto a boat.

Host Phil Keoghan welcomes 12 new crew members to Catalina Island, off the coast of Southern California; competitors must build a concrete retaining wall for their first individual competition.

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