he first season of Brothers & Sisters, an American serialized family-drama television series created by Jon Robin Baitz, began airing on September 24, 2006, on ABC.

Brothers and Sisters follows the lives of The Walker Family who include: Nora Walker, her brother Saul and her children Sarah, Kitty, Tommy, Kevin, and Justin. The series began with the death of Nora's husband William Walker and follows the discovery that he had a twenty-year affair with Holly Harper and the fact that William and Holly had a child together, Rebecca, that no one knew about. As well as this central plot bringing the family together, each character must deal with the events of their personal lives.

Overview from themoviedb.org