The candidates enter the choppy waters of the fish business - sourcing and creating a fish dish to sell to the public. Half the team heads down to Cornwall, with members having to find their sea legs while fishing for their chosen catch of the day. The other half remains in London, convincing a top corporate client to buy into the dish. At the food market, competition is tough between the stalls while selling their fishy fare to the public. However, bad businesses decisions and poor planning mean one team's chances of winning sink without a trace. Karren Brady and Tim Campbell act as Lord Sugar's eyes and ears on the ground.

In a tourist hot-spot in north Wales, the candidates run their own highland railway, quarry tour and zip line.