When he lost three limbs in Afghanistan, Jon's life changed forever. Now he wants to build a house that allows him to live independently. The design is cutting edge, but the budget spirals. Marine captain Jon's life changed forever when he stepped on a landmine. Before his injuries, home for Jon had meant a crooked chocolate-box Devon cottage. After countless viewings of uninspiring specialist dwellings and awkward conversions, they realised that the only way to get a house that would enable Jon to live independently was to build it themselves. The design boasts sleek glass walls, open-plan spaces and a dramatic wing-like roof. Crucially the design concept is for there to be no noticeable adaptations due to Jon's disabilities. Despite his lack of experience, Jon decides to project manage and calls on the support of a number of military charities for this hugely ambitious project. The pressure to finish on time increases when Becky discovers she is pregnant. 2100 Channel 4. tonight.