Kitchen Den. Mark and Lauren get the help of experts to design dream dens for children. Eleven-year-old Nathan wants a kitchen hangout where he can practise being a chef. [S,SL]
Queen Victoria Den. Joe and Lauren help build a den for kids. Eleven-year-old Amelie wants a Queen Victoria den where she can pass on her love of history to her friends. [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,SL]
Australia Den. Joe and Lauren help build a den for kids. Eight-year-old Oscar lives in Scotland and wants an Australia den so he can remember his Aussie hometown. [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]
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]
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]
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]
Revisits Episode 1. The 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. [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]
Magical Library Den. Mark and Lauren get the help of experts to design dream dens for children. Eleanor, ten, loves books, so the team bring the library to her - a magical library! [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]
Eco Den. Mark and Lauren get the help of experts to design dream dens for children. The team build 11-year-old Whitney her very own den to answer all her eco needs. [S]
Adventure Den. Mark and Lauren get the help of experts to design dream dens for children. Needing to go to hospital means Rufus often misses out on the play adventures he loves. [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]
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,SL]
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,SL]
Kitchen Den. Mark and Lauren get the help of experts to design dream dens for children. Eleven-year-old Nathan wants a kitchen hangout where he can practise being a chef. [S,SL]
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,SL]
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]
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]
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]
Tap Dance Den. Angel from London is a top tap dancer who needs a space of her own where she can train properly, store her costumes and display all of her medals. [S]
Shakespeare Den. History buff Hector from Wigan is a huge fan of William Shakespeare. He needs a space of his own where he can enjoy his hero's works and write plays. [S]
Optical Illusion Den. Siblings Nethuni and Abheetha are obsessed with optical illusions and want a den where they can work together to create new tricks to dazzle their friends. [S]
Sausage Dog Den. Bea from Hull and her best friend Stanley the sausage dog are seriously short of space. They need a den where they can learn new tricks and hang out together. [S]
Strictly Come Dancing Den. Ballroom dancer Harry from Dudley is a huge fan of Strictly and wants a den full of glitz and glamour to help him practise his dancing and store his trophies! [S]
Ancient Egyptian Den. Lydia from County Durham is passionate about the ancient Egyptians and wants an appropriately themed den where she can learn more about this fascinating period from the past. [S]
Lucky Cat Den. Ollie wants a lucky cat-themed den where he can relax, hang out with his favourite feline Graham and work on his very own comic stories. [S]
Illustration Den. Stan from Cumbria is a talented artist and a huge fan of comics. However, he has nowhere to draw and needs a den to work on his illustrations and display his art. [S]
Beach Den. Twelve-year-old Annabell loves the seaside but lives in Milton Keynes, miles from the coast. She would like her very own beach den where she can spend time with friends and relax. [S]
Weather Den. Amayah from Sheffield is a huge fan of the weather and dreams of becoming a forecaster. She wants a den where she can study the weather and create her very own forecasts. [S]
Bagpipe Den. Gregor from Aberdeenshire needs somewhere to practise, store and maintain his bagpipes. He dreams of becoming a professional, but his pipes are too loud for the rest of the family. [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]
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]