Richard works with fireplace expert John Sullivan to rough in the ductwork for the new direct vent gas fireplace units. Norm and Tom add some subtle Greek Revival details to the interior window trim package. For inspiration for her own urban garden, Roger takes homeowner Angela Daigle to see some hidden gardens of Beacon Hill. Painting contractor Mauro Henrique paints the exterior window trim on the rowhouse and puts up samples of color choices for the new front door. In the second half of the hour, Tom teaches a homeowner how to repair some structural problems in his home. Electrician Scott Caron helps a homeowner run wiring for a new ceiling fixture and switch in a living room. And the guys ask, "What is it?"