Overview: Landscaping contractor Roger Cook and chainsaw expert Tim Ard demonstrate safe chainsaw use and a brand new way to sharpen chains. Then, general contractor Tom Silva helps a homeowner with a leaky rain gutter. Back in the workshop, Roger and Tom, along with host Kevin O'Connor and plumbing and heating expert Richard Trethewey ask, "What is it?" Then, Richard and Kevin install a new fiberglass bathtub and shower enclosure.