Landscape contractor Roger Cook helps homeowner Rob Faris install a backyard drywell to handle the torrent of the rainfall from his roof gutters. Back in the loft, Roger, plumbing and heating expert Richard Trethewey, general contractor Tom Silva and host Kevin O'Connor try to guess "What is it?" Then Tom makes a House call and shows homeowners Sal and Joanne Scarpato how to install a safety grab bar in their bathtub.