The progress on the mudroom and kitchen is recapped; porcelain plank floor tile is installed on treads and risers of the garage stairs; the holes for the recessed lights in the great room are patched; shutters are painted; and how the arched doorway was squared off is explained. Also: abandoning an old electrical box and fishing wires to a new one. In the second half: repairing broken sash cords; and planting bulbs. Also: historian Doris Kearns Goodwin guests in the "What Is It?" segment.