I got a question for you: Brooke Smith (born May 22, 1967) is an American actress, known for her role as Dr. Erica Hahn on the ABC medical drama series Grey's Anatomy, and for her role as Catherine Martin in the 1991 horror film The Silence of the Lambs. Smith portrayed Sheriff Jane Greene on the A&E horror series Bates Motel.

Based on this passage, who plays dr. hahn in grey's anatomy?
Let's think first:
To answer the question, consider the following: Brooke Smith (born May 22, 1967) is an American actress, known for her role as Dr. Erica Hahn on the ABC medical drama series Grey's Anatomy, and for her role as Catherine Martin in the 1991 horror film The Silence of the Lambs. Smith portrayed Sheriff Jane Greene on the A&E horror series Bates Motel.
Therefore, the answer is Brooke Smith.