Nathan Galui

The remaining designers are deployed to a military base where the drill is to turn two drab rooms into unique entertainment spaces.

The three remaining designers face off as they decorate a home office for Kathy Griffin, a guest bedroom for Tiffani Thiessen and a baby's nursery for Jason Priestley.

The final two designers go head-to-head in the biggest Design Star challenge yet: making over a deserving family's entire home. Even with the help of a crew of carpenters, it's a daunting task that takes everything they've got.

The designers meet their most demanding clients yet.

In a Design Star first, the final four designers must work as a team to design and renovate a 10,000 square foot backyard. In their quest to create a modern oasis, tensions run high as the four strong voices struggle to be heard.