It's the last of the nine heats as three new designers battle it out for the last place in the second round and the chance to win The Great Interior Design Challenge. This time, our three amateurs will be redesigning the master bedroom of three 1930s Hollywood-inspired apartments in West London. Deputy restaurant manager Jack, the youngest designer in the competition, has the tough task of creating a room that combines his homeowners' diverse tastes – Celtic, oriental and art deco. Online home accessories retailer, Hannah must keep true to the Nordic scheme her client has asked for, whilst incorporating his beloved wall-hanging into her design. Vintage fan Jo delivers an art deco scheme – but will it have the contemporary twist that her clients have asked for? Architectural Historian Tom Dyckhoff explores the history of these iconic apartments, originally designed to attract the emerging stars of the silver screen, while judges Sophie Robinson and Daniel Hopwood decide who has the winning room – but with such varied designs to choose from, it's a tough choice to make. But with only three days, a £1000 and challenging briefs, the designers must work hard to prove they deserve a place in the second round.