General contractor Tom Silva shows host Kevin O'Connor how to cut a pane of glass safely and accurately. Then landscape contractor Roger Cook helps a homeowner beautify a fieldstone wall behind her home with two varieties of flowering vines. Back in ... (more)the loft, Tom, Roger, Kevin, and plumbing and heating expert Richard Trethewey try to guess "What is it?" Then Richard helps two viewers install a portable air conditioning unit in their overheated attic apartment.