The architect meets a couple who are converting a rusty ship's wheelhouse into head-turning accommodation for their Welsh glampsite. In Scotland, George revisits a designer who he met on the first series to see a pair of his gorgeous new eco-builds. He ends his Denmark trip at a modernist home and finally gets to reveal his own amazing space - a cabin in the sky, built on an old scissor lift.

In one of the most ambitious and eccentric builds ever, a man attempts to build a miniature canal and lock to house a narrow boat - and then turns the boat itself into something never before seen on the series. George also visits a house full of colour in London and an all-black, one-bedroom hotel housed in an old industrial crane in Denmark, while Will Hardie checks out a wooden home in a horsebox. Together, the pair put the final touch to their 18th-century-inspired cabin in the sky.

George follows more of the most eccentric, ambitious and passionate self-builders he's ever met. He also attempts to create an elegant airborne cabin from an old industrial scissor lift and heads to Denmark, home of gorgeous and minimalist architecture. In this episode, a young couple challenge themselves to fit a camper on the back of a tiny Italian Tuk-Tuk, and a father of two boys creates a quirky getaway in an abandoned nuclear bunker. Meanwhile, George and Will Hardie create lightweight furniture for their sky cabin, with mixed results.

In Denmark, George meets a young couple tackling the enormous task of turning a derelict water pumping station into a luxury holiday home. Meanwhile, a dedicated outdoor swimmer builds himself a futurist micro camper. George and Will come up with a novel way to pick the colours for their elegant sky cabin, Will Hardie visits a glamping pod built in an upturned boat, and George visits one up a tree in a Danish forest.

A couple attempt to combine an army lorry and an old caravan to create the ultimate off-roader, and a man returns to his family's farm to build a luxury cabin. Meanwhile, George visits a building in Denmark that was designed to be a work of art and an office, checks out a skip that's been turned into a home, and takes inspiration for his scissor lift cabin from a stunning 18th-century bridge.

A man pays homage to one of the great modernist homes with his new garden room and George visits the teenager who created a shepherd's hut last year, to follow his latest build. George visits a bizarre garden folly inspired by a wedding cake, a striking beach house inspired by pill boxes and an old RNLI station. In Denmark, the architect checks out a stunning circular house inspired by the owner's car collection.

An actress moves up the four-wheel property ladder, from a one-bed tiny transit to a two-bedroom luxury Luton Van conversion. A train carriage gets a makeover into a dog-friendly holiday let and George visits an amazing underground bar as well as a house in Denmark that is completely covered in seashells. The saga of the scissor-lift cabin continues, as George and Will Hardie get to grips with some serious weight issues.

George has the idea of turning a rusty scissor lift into a cabin in the sky and starts his Denmark trip with a visit to a modern take on the old Viking longhouse. After a bus from a previous series burned in a fire, its owner replaces it with an ambitious new build made of four shipping containers. Plus, a beautician and her daughter create a four-wheeled beauty parlour.