S1, E2: As Luke and Taylor prepare for the underwater drive, they dive into the mysteries lurking beneath Darwin Harbour where the world record will take place. Negotiating explosive ornaments, shipwrecks, and gas pipes, they must meticulously plan the perfect route for their 1978 Land Cruiser, now dubbed the Mudcrab. Simultaneously, challenges arise in refurbishing the Mudcrab's chassis and contemplating an electrifying transformation. The clock is ticking as the team faces unexpected twists, leading to a riveting off-road showdown against Land Cruiser experts Graham and Laurie Smith.