Tom gets ready for a major upgrade to the front of the house - a Greek Revival-style front door. In the kitchen, Angela's cabinets have arrived; on the second floor, Tom and Kevin install new wood wainscoting to replace the old worn out, poorly made version. Norm learns about Charlestown's ancient past from city archaeologist Joe Bagley, who provides a rare look at his warehouse of artifacts. Tile contractor Mark Ferrante uses a marble basket weave tile from an online supplier to make a feature wall insert in the master shower. At the back addition, Kevin and Tom install a small section of copper roof to add character and durability to the small roof. On ASK THIS OLD HOUSE, Richard travels to Kansas City to sample some unique barbeque and help a homeowner install a natural gas line for a new grill. Kevin, along with Roger, Richard and Tom, asks "What is it?" Afterward, Roger shares some tips on what grows best in the shade and Tom helps a homeowner hang a heavy, decorative mirror on a masonry chimney.