General contractor Tom Silva travels to Venice, California, to help two homeowners fix their stubborn sliding closet doors. Back at the loft, Tom, landscape contractor Roger Cook, plumbing and heating expert Richard Trethewey, and host Kevin O'Connor try to guess "What is it?" Richard shows Kevin the basics of electric radiant floor heat. Then Kevin and preservation specialist Sally Zimmerman use a new software package to help homeowners select historically appropriate exterior paint colors for their Queen Anne Victorian.