Kevin joins the legions of Cambridge locals by biking to work on a vintage bicycle restored locally. Tom shows Kevin how he's gotten rid of the steps to the roof deck. Roger arrives to tackle the giant stump left over from the old Norway maple. Richard shows Kevin how they've kept the ducts out of the roof rafter bays to preserve that space for insulation, and on the second floor, how they've hidden the air handler at the top of a hall closet. In the second half of the hour, on ASK THIS OLD HOUSE, Roger heads to Miami to help a homeowner plant several varieties of palm trees in her front yard. Then, Roger, along with Kevin, Richard, and Tom, asks "What is it?" Afterward, Kevin shares information on new light bulbs. And Richard replaces an old heating system and hot water heater with a much smaller and more efficient single appliance.