Edith agrees to show Mike and Gloria's old house to potential renters. But Archie is outraged; The prospective tenants are a black family, and he remembers his far-from-pleasant relationship with the house's previous African- American occupants, the Jefferson family. Isabel Sanford makes a "crossover" appearance in her familiar role of Louise Jefferson; other cast members include Janet MacLachlan as Polly and Richard Ward as Ed. Written by Mel Tolkin and Larry Rhine, "The Family Next Door" first aired on March 18, 1979. ~ Hal Erickson, Rovi