The final four Designers face their most ambitious challenges yet. For their Design Challenge, they must each transform the inside of an old school bus! The sky is the limit, as they can turn the bus into any sort of space they want. This week's Camera Challenge is also the biggest yet for the Designers. They must appear on the national daytime show, The Talk. Each of them must present an unconventional design tip to the viewers, while interacting with hosts Julie Chen and Sheryl Underwood. The pressure is intense, as the Designers attempt to complete both challenges successfully. The performances on The Talk and the bus designs are evaluated by the Panel, Genevieve Gorder, Vern Yip and Sabrina Soto. When Evaluation is complete, only three Designers remain in the competition for their own show on HGTV. David Bromstad serves as Host and Mentor.