Season 4

Eight-year-old Oscar lives in Scotland and wants an Australia den so he can remember his Aussie hometown.

Eleven-year-old Amelie wants a Queen Victoria den where she can pass on her love of history to her friends.

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.

Cara, who has a form of dwarfism, has a sweet tooth and loves to dance. She needs a Sweetie Den where everything is the right height for her and she can disco dance!

Jilan, 12, has a passion for politics and wants to be prime minister one day. She needs a Politics Den where she can plan her campaigns in peace and quiet!

Rhodri can't go to his local cricket club as often as he'd like. Rhodri needs a den where he can practice cricket whenever he likes.

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.

Archie needs a farm den where he can grow and harvest vegetables and look after his chickens.

Tali needs a magic den where she can practise her tricks in secret, without giving the game away.

Campbell needs a cycling den where he can cycle all over the world without getting oil on his parents' sofa.

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.

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.

Lauren and Joe revisit the eco, Scottish castle, Turkish and sport dens.

Lauren and Joe revisit the observatory, gingerbread house, sensory and community dens.