Synopsis

On this episode, general contractor Tom Silva assists a homeowner in replacing a leaking skylight, the water dripping through to the kitchen below. Later, joined by Kevin O'Connor, plumbing and heating specialist Richard Trethewey, and landscape contractor Roger Cook, Tom and the team ponder the question: "What is it?" Following this, electrician Peg Preble demonstrates to Kevin how to diagnose and fix a malfunctioning three-way light switch.