First, Sandy and Jim Beall have become amateur archaeologists, as they excavate beneath the kitchen in their 1818 Georgian-style house in rural Maryland. Then, a 1908 Prairie-style home connects the owners, Denise and Dwayne Thomas, to the prominent Jacksonville, Fla. architect and original owner, Henry John Klutho. Finally, in Thibodaux, Louisiana, Richard Bourgeois restores an abandoned Greek Revival set on an old sugar plantation, where he learns of the previous owner's recipe for soda pop and the house's Civil War ties.