Plot: Mel Giedroyc returns with the carpentry contest, which sees 10 woodworking enthusiasts fight hammer and nail as they create various projects that combine epic scale with fine craftsmanship and cutting-edge design. To remain in the competition they have to impress the judges, entrepreneur and woodworking expert Sophie Sellu and design academic Tom Dyckhoff, while a series of surprise challenges keep them on their toes - and give them the chance to win a lifeline