This week the topic is wood. Sorta kinda. Actually, we'll be touching on the very special wood that went into the new Cadillac Ciel concept, and we'll be talking with none other than Clay Dean, the Director of North America Advanced Design for GM. We'll be asking him where the future of Cadillac and other GM design is going in the next few years, and we'll see if we can talk him into letting us test drive Cadillac's new über-sedan -- but somehow we doubt it. To discuss this and more, John McElroy is joined in studio by Peter De Lorenzo, the Autoextremist, and Scott Burgess from The Detroit News.