"Brothers and Sisters": The WalkersThe brothers and sisters of "Brothers & Sisters" are unique in sheer plenitude. Besides the five core Walker siblings -- Sarah, Kitty, Kevin, Tommy, and Justin -- "Brother and Sisters" also features the close bond between matriarch Norah and her brother Sal. And then there's the convoluted ordeals of nobody -- turned illegitimate half-sister -- turned nobody -- turned sister-in-law -- turned nobody Rebeca Harper and Ryan "the less said, the better" Lafferty.