Host Kevin O'Connor surveys progress at the Concord, Mass., barn rehab, inspecting the new front door and a built-in dining-room hutch, while contractor Tom Silva works on the dining room's crown moulding. Outside, landscaper Stephanie Hubbard has an update involving plantings around the new shed. O'Connor also visits the “New Yankee Workshop” to check out carpenter Norm Abram's progress on the frames for interior sliding windows; and tours the historic Noah Brooks House in Lincoln, Mass. On “Ask This Old House,” landscaper Roger Cook builds a brick walkway in front of a North Reading, Mass., home and Silva teaches O'Connor how to cut miter in wood trim.