From Wikipedia, the free encyclopedia.   Brooke Smith (born May 22, 1967) is an American actress. She is best known for her role on the TV show Grey's Anatomy as Dr. Erica Hahn and for her role as Catherine Martin in the 1991 film The Silence of the Lambs. Description above from the Wikipedia article Brooke Smith, licensed under CC-BY-SA, full list of contributors on Wikipedia