Overview: Guido Heinz Frinken and Bruce Darnell visit a modern architect's house in Stuttgart that looks inconspicuous from the street - but there are a few special features hidden inside. The next house is in Kehl on the border with France: a half-timbered barn that stands out from afar due to its old charm. Finally, the two jurors visit a concrete house near Stuttgart. What may sound like a gray block turns out to be a real design highlight with glass house fronts. Which of the three houses will make it to the final?