Host Phil Keoghan welcomes 12 new crew members to Catalina Island, off the coast of Southern California, to kick off season four, on a special two-hour season premiere.
Crew members visit a plant nursery where attention to detail is key when building a complex planter box in the individual challenge.
Season three competitor and diesel mechanic Quincey Walker returns to guide the crews through a series of auto service challenges.
Savage Crew and Dirty Hands go head-to-head in the final team battle comprised of challenges inspired by the trades.