Orangutan Den. Duncan from Glasgow is passionate about protecting orangutans. He needs a den where he can learn more about these primates and how to help them, and share his passion with friends. [S]
Science Den. Zoe from Oxfordshire is mad about science and desperately wants a den where she can pursue her passions and carry out noisy, messy experiments whenever she wants! [S]
Rollercoaster Den. Keir from Rugby is a massive fan of rollercoasters. He wants a den where he can celebrate his passion, design his own coasters, and share his love of rides with friends. [S]
Army Coding Den. Eleven-year-old Yusuf dreams of being in the army and hopes to one day to use his love of computer coding to become an army intelligence officer. [S]
Science Den. Zoe from Oxfordshire is mad about science and desperately wants a den where she can pursue her passions and carry out noisy, messy experiments whenever she wants! [S]
Observatory Den. Mark and Lauren get the help of experts to design dream dens for children. Helena needs a den to help her reach for the stars and fulfil her science dreams. [S]
Highlights. Joe and Meryl look back at all the amazing dens built throughout the series and reminisce about the great kids, the tense surprises and the big reveals. [S]
Funfair Den. Ten-year-old Evie wants a den where she can spend quality time with her aunt, whose chronic rheumatoid arthritis means she is unable to get up the stairs to Evie's room. [S]
Opera House Den. Twelve-year-old Ashley needs an opera-themed den so he can sing to his heart's content. He has Tourette syndrome and singing helps him to overcome it. [S]
Amazonian Den. Eight-year-old Nathan loves learning all about the rainforest from his dad and wants a den so he can feel like he is deep in the Amazonian rainforest every day. [S]
Underwater Den. 11-year-old Maariya was scared of going underwater but overcame her fear a few years ago. Now she loves swimming, snorkelling and all things underwater. [S]
Highlights Episode. Joe 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. [S]
Sensory Den. Joe and Lauren design dens for children. Eleven-year-old Cammy, who is one of six siblings, needs a place where he can be on his own, in calm and quiet. [S]
Witchcraft and Wizardry Den. Joe and Lauren design dens for children. Nine-year-old Kiran wants somewhere he can let his love of witchcraft and wizardry come to life. [S]
Revisits Two. The presenters look back at more of our dens from previous series and catch up with our dengineers to see how the dens have changed their lives. [S]
TV Show Den. Vilonu is a huge CBBC fan and dreams of becoming a TV presenter when she is older. She wants a space where she can write, film and edit her very own TV shows. [S]
Turkish Den. Joe and Lauren design dens for children. Ten-year-old Dilara wants a Turkish den where she can share her passion for Turkey with her friends. [S]
Martial Arts Den. Joe and Lauren get the help of experts to design dens for children. Nine-year-old Nya really needs her own space to indulge her love of martial arts. [S]
Scottish Castle Den. Joe and Lauren get the help of experts to design dens for children. Brothers Alec and William want a den that looks like a traditional Scottish castle. [S]
Marble Run Den. Ocean 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. [S]
Revisits One. The presenters look back at some of our dens from previous series and catch up with our dengineers to see how the dens have changed their lives. [S]
Highlights. The presenters look back at all the amazing dens the team have built throughout the series and reminisce about the great kids, the tense surprises and the big reveals. [S]
Revisits Episode 2. A look back at some of the amazing dens from series 1 and 2. Lauren revisits the train, magical library, community and plane dens. [S]
Highlights Den. Mark and Lauren get the help of experts to design dream dens for children. The team look back at all the amazing dens built throughout the series. [S]
Journalism Den. Mark and Lauren get the help of experts to design dream dens for children. The team create a fantastic journalism den where Soibi can write news reports. [S]
Community Den. The Dengineers help St Hugh of Lincoln Primary School in Manchester create a new space for pupils with specific needs from an old double decker bus. [S]
Cycling Den. Experts design dream dens for children. Campbell needs a cycling den where he can cycle all over the world without getting oil on his parents' sofa. [S]
Hotel Den. Ten-year-old Florence from Oxfordshire wants a cool hotel den so that she can relax, hang out with friends and be on holiday whenever she wants. [S]
Plane Den. Mark and Lauren get the help of experts to design dream dens for children. The team build 11-year-old Philip his own den where he can build model planes. [S]
Magic Den. Experts design dream dens for children. Tali needs a magic den where she can practise her tricks in secret, without giving the game away. [S]
Hollywood Cinema Den. Mark and Lauren get the help of experts to design dream dens for children. The Dengineers build 11-year-old Lola an old-fashioned cinema den. [S]
Gingerbread Den. Mark and Lauren get the help of experts to design dream dens for children. The Dengineers build ten-year-old Carrie a gingerbread house den. [S]
Bollywood Den. Mark and Lauren get the help of experts to design dream dens for children. The Dengineers build ten-year-old Aron his very own Bollywood den. [S]
Episode 11. The presenters look back at all the dens they have built throughout the series and reminisce about the great kids, the tense surprises and the big reveals. [S]
Sewing Den. Daisy loves sewing but has to pack everything away when it is dinner time. She needs a sewing den where she can create fabulous designs in peace. [S]
Community Den. Mark and Lauren get the help of experts to design dream dens for children. The pupils of the Lancasterian School want an exciting space that everyone can hang out in. [S]
Spy Den. Mark and Lauren get the help of experts to design dream dens for children. Sienna really needs a new bedroom which can double up as a spy den, with lots of techy gadgets. [S]
Train Den. Mark and Lauren get the help of experts to design dream dens for children. Ten-year-old Ben wants a den with space to help keep his trains running on time. [S]
Art Den. Mark and Lauren get the help of experts to design dream dens for children. Nyobi needs room, a desk space and art materials for her design projects. [S]
Kitchen Den. Mark and Lauren get the help of experts to design dream dens for children. 11-year-old Nathan wants a kitchen hangout where he can practise being a chef. [S]
Dance Den. Mark and Lauren get the help of experts to design dream dens for children. Jazz and Katelyn love dancing and want to put a dance studio in Jazz's mum's cellar. [S]