The crew removes a central chimney brick-by-brick so they can be reused on another job, host Kevin O'Connor visits an "eco" resale store in Springfield, Massachusetts, and landscape contractor Roger Cook removes a sick Norway maple with the help of an arborist. In the second half of the hour, on ASK THIS OLD HOUSE, Roger helps a homeowner install a bluestone patio in an urban backyard. Then, Roger, along with Kevin, plumbing and heating expert Richard Trethewey, and general contractor Tom Silva, asks, "What is it?" Afterward, Tom helps a homeowner and her daughter hang their bikes in a small garage.