Tom helps homeowners Rich and Sarah Paisner of Brighton, Massachusetts, get organized by installing adjustable shelves on the wall in their den. Back in the loft, Tom, Richard, Roger and Kevin ask, "What Is It?" Then Roger is joined by soil expert Roberta Clark from the University of Massachusetts for some tips on testing soil before planting. Then Richard gets Tewksbury, Massachusetts, homeowner Paige Impink into hot water by installing a hot water recirculator pump in her upstairs bathroom.