Joe and Meryl take a look back at some of the amazing dens from the series and catch up with some of our Dengineers to see how the dens have changed their lives.

Joe and Meryl take a look back at memorable moments and amazing dens from the series.

A nine-year-old who lives in one of the UK's most famous summer hotspots longs for a Christmas-themed den where she can celebrate her favourite season all year round.

Sea cadet Jonny became fascinated with naval history through his grandad and is now a huge fan. He wants a submarine-themed den where he can celebrate his passion, learn more and enjoy hanging out with mates.

Emily from the Scottish Highlands is crazy about crochet, and her crafty creations are taking over the house and driving Mum and Dad mad. She desperately needs a space where she can crochet to her heart's content, store all her woolly wonders and hang out with mates.

Goalkeeper and football fan Tristan had to take a break from playing with his local team due to illness. He wants a den to help him recover and to store all his football memorabilia.

Avanaya from Leicester wants a relaxing, Indian-themed den so that she can escape her three cricket-loving brothers, and to remind her of the special times she has spent visiting her grandma in India.

Keir from Rugby is a massive fan of rollercoasters. Not only does he love to go on rides, he also likes building his own, and one day dreams of becoming a rollercoaster designer. He wants a den where he can celebrate his passion, create new coasters, and share his love of rides with his friends.

Zoe from Oxfordshire is mad about science and dreams of becoming a scientist one day. She loves to carry out messy, noisy experiments, but her dad works night shifts, which means she has to be quiet while he sleeps. She desperately wants her own space where she can pursue her passions and make a mess whenever she wants!

Duncan from Glasgow is passionate about protecting orangutans and wants to raise awareness of their plight within his local community. He wants a den where he can hang out, learn more about his favourite primates and how to help them, and share his passion with friends.

Angel from London is an aspiring tap dancer who has nowhere to practise her moves. She is always scuffing her mum's floors and annoying her brother with the noise. She needs a tip-top tap dance space where she can train properly, store her costumes and display her medals.

History buff Hector from Wigan is a huge fan of William Shakespeare. He needs a space of his own where he can store all his history books, write plays and enjoy his hero's works.

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.

Bea from Hull and her best friend Stanley the sausage dog love to hang out together, but they are seriously short of space. They need a den where Bea can teach Stanley new tricks and they can be best buddies together.

Ballroom dancer Harry from Dudley is a huge fan of Strictly Come Dancing and wants a den full of glitz and glamour to help him celebrate his favourite TV show, practise his dance moves and store all of his trophies! Packed with sequins, sparkles and stunning celebrity surprises, this episode has more ups and downs than a Strictly show dance - but will the den score a ten with Harry?