In addition to playing matriarch Nora Holden on "Brothers & Sisters", she has played Abby's mom on "ER"
In 1979 Field played the eponymous union organizer in Norma Rae, ... Field 
had a recurring role on ER in the 200001 season as Dr. Abby Lockhart's mother,
... [DOC] [TLE] Oscar Explorer [PAR] In each decade of her career, she has been known for major roles in ... ER in 
2000; and for her starring role as Nora Holden Walker on ABC's series Brothers & 
Sisters in 2007.