However, Wisit wasn't loving the eco-challenge that ended up derailing him this week. We were so sad to see him leave, but confident that he has a brilliant career ahead using any one of his multiple talents (just not as an environmental consultant). Random thoughts: If anyone is going to get poisoned soon, my money's not on Nathan. Eco-expert Danny Seo is an interesting guy who's smartly created an interesting specialty. We taped this episode during a heat wave of 100+ degrees with no air-conditioning; it's a miracle the contestants and crew survived. We were nostalgic for the shop-window challenge's deep freeze. Did you know that Martha Stewart only hires the best? This challenge's oddball office location looked circa-Mad Men era, complete with 1960s carpet, but lacked any swagger and swank. Definitely no swank.

Eddie's room won because it was amazing, and he seemed to really push himself and have fun with this challenge. Packed with terrific ideas that were reasonably eco-responsible (some were edited from the show due to time constraints), the space looked larger than life The back-to-back partners' desk was brilliant, as was the eco-friendly repurposing of wood blinds to fashion a light fixture and door "privacy panel," the storage concealed behind tailored curtains, inexpensive yet stylish desk accessories, and a few eco-conscious office solutions (including a cool floor lamp) created from an odd assortment of materials. We were insane over his repurposing the carpet as a wall covering/pegboard/sound baffle. Except that even after hours of questioning he somehow neglected to inform us it wasn't actually his idea. Ouch.

Ondine was hampered by Wisit's elegant, feminine fabrics and color scheme in designing for her male client, but she crafted an ingenious, fabulously wonky water-bottle light fixture that charmed us and suited the firm's eco mission to a T. Preston's conference room was smart and stylish, with a soothing color palette, well-styled bookshelves, and an inventive Dorothy Draper-like taped conference table in place of the expected stodgy brown furniture. Danny busted him on his pint-size recycling cans, but Preston's overall creativity and design aesthetic were as confident and as polished as possible given the budget, materials, and time constraints.