The DengineersSeason 32017 · 14 episodesEpisodes1Revisits Episode 1The presenters look back at some of the amazing dens from series one and two. Here, Lauren revisits the survival, art, Hollywood cinema and DJ dens.2Revisits Episode 2The presenters look back at some of the amazing dens from series one and two. Here, Lauren revisits the train, magical library, community and plane dens.3Observatory DenHelena needs a den to help her reach for the stars and fulfil her science dreams.4Rugby DenWill needs a rugby den to keep him in the game.5Community Den SpecialJoe and Lauren help build a den for the children and their siblings at Claire House Children's Hospice in Liverpool.6Marble Run DenOcean loves marble runs because they're like rollercoasters and one day he'd like to be a rollercoaster designer. He wants a marble run den.7Christmas DenAstrid needs a Christmas den so she can enjoy that special day all year round.8Scottish Castle DenBrothers Alec and William want a den that looks like a traditional Scottish castle.9Martial Arts DenNine-year-old Nya really needs her own space to indulge her love of martial arts.10Turkish DenTen-year-old Dilara wants a Turkish den where she can share her passion for Turkey with her friends.11Witchcraft and Wizardry DenNine-year-old Kiran wants somewhere he can let his love of witchcraft and wizardry come to life.12Sensory DenEleven-year-old Cammy, who is one of six siblings, needs a place where he can be on his own, in calm and quiet.13Sport DenNine-year-old Maddie needs a space of her own where she can focus on her sporty future.14Highlights EpisodeJoe and Lauren look back at all the amazing dens built throughout the series. They reminisce about the great kids, the tense surprises, and the big reveals.Season 1Season 2Season 4Season 5Season 6Season 7