In Brittany, Donna and Paul return to the basement of their five-storey home, and the race is on to install the final windows and seal the rear façade before the elements take over. At Château de la Grillère, Tim and Sharon are desperate to open their doors to guests, but with a first-floor suite unfinished, a window seat to build and wasps in the chimney, everything is against them.

At Château La Grande Maison, Ben and Billie dream of transforming their tired orangerie into a serene health spa, while Chris and Jolyon tackle the final two of their eight bedrooms, taking on intricate wallpaper, a handmade bunk bed and a secret bookcase door.