Mel Giedroyc welcomes the three finalists back to the workshop nestled in ancient woodland on Wales' Glanusk Estate to make their biggest build yet - towering garden buildings. With just two days to build huge creations that would take professionals weeks to make, the woodworkers must give this final build everything they've got. Only one competitor can win, and it's up to judges Alex de Rijke and Helen Welch to decide who is Britain's best woodworker.

The semi-final finds the final four woodworkers getting tipsy and glamorous with drinks cabinets inspired by a specific decade. They have to craft sliding doors and complicated mechanisms in a bid to make it through to the final. However, judges Alex de Rijke and Helen Welch aren't letting up, as they set a steamy surprise challenge that may bend the woodworkers out of shape. 

It's the quarter-final and the five remaining woodworkers turn up the heat and go wild as they take on animal sculptures. They must chainsaw and carve their way through this colossal big build and unleash their inner beasts as they attempt to uncover an animal within the wood, in just two days. Judges Alex de Rijke and Helen Welch also set them a physically demanding skills challenge that takes them back to Viking times, but only one woodworker can win the immunity that will guarantee them a place in the semi-final.

The seven remaining woodworkers face the toughest big build of the competition so far and one of the hardest objects to make - a chair. They must bend and build their way to create chairs that could become design classics in just two days and craft what would take a professional weeks to make. And in the skills challenge, the woodworkers' whittling skills are tested. Award-winning architect Alex de Rijke and queen of furniture-making Helen Welch monitor proceedings as judges, with a double elimination in the offing.

In this episode, the eight remaining enthusiasts face a very small and intricate big build challenge as they wrestle with woodworking on a miniature and precise scale to make dolls' houses. However, these dolls' houses are not child's play, as the woodworkers must design and build houses that could become collectors' pieces - the devil's in the detail. With just two days to build what would normally take weeks, the pressure is on.

In this opening episode, the woodworkers have two days to complete a bed of dreams that may become the stuff of nightmares. And in the surprise skills challenge, they must celebrate the fine skill of hand carving, with an invaluable prize for the winner.