Viewers will witness how the design team came to the home of Patricia and Milton Harper in the Atlanta suburb of Lake City, Georgia, where heavy rains often caused the family's septic tank to malfunction and spew raw sewage into the house. When life got messy, Patricia and the kids, Darius, 17, LaVaughn, 15, and eight-year-old Mister, would sleep in their van, while Milton Harper pumped out the refuse. A 5,300 square-foot English style home - the largest yet constructed by ""Extreme Makeover: Home Edition"" -- was built for the family. The design team, contractors and hundreds of workers and volunteers were able to turn the Harpers' living nightmare of a house into a dream home. The process of their particular home makeover is the subject of this episode of ""Extreme Makeover: Home Edition -- How'd They Do That?""

While design team leader Ty Pennington was preparing to film this episode in his hometown of Atlanta, he underwent surgery for a perforated appendix. Although he was still recupe