Watch Grand Designs: House of the Year Season 6 Online

In the first programme, Kevin and his co-presenters, architect Damion Burrows and design expert Michelle Ogundehin, visit five breathtaking houses competing for a place on the shortlist - a 1960s- inspired water tower in rural Norfolk, a 21st-century addition to a Victorian London street, a sleek beach house beside a busy south coast boatyard, a 14th-century fortress in Cumbria with a radically contemporary interior and a Georgian farmhouse with an angular, space-age extension