In the final episode of the Newton project, host Kevin O'Connor meets lighting designer Susan Arnold to see how she is using new light sources and more modern fixtures to update the formerly dark areas of the house. Greg Smizer, Larry Schulman, and Eric Reinhardt install the security system, plasma televisions, and audio systems while Meghan Hodge installs window treatments. Landscape contractor Roger Cook inspects the finished garage and meets landscape architect Stephanie Hubbard to see the finished back porch and terrace. Homeowner Paul Friedberg and his sons break in their new backyard with a game of Home Run Derby. Architect Treff LaFleche hangs a historical marker out front. Designer Abbey Koplovitz and homeowner Madeline Krauss display how they have pulled together the interior with paint colors, custom furniture, window treatments, rugs, and family antiques. Plumbing and heating expert Richard Trethewey tests the new digitally controlled shower system in the master bath while master carpenter Norm Abram tours the finished kitchen with designer Donna Venegas. As the wrap party begins, the team gathers on the front porch to toast general contractor Tom Silva on a job well done.