Bennett Epstein is a proctor and doctor.
Bennett was brought in as a proctor when George re-took his intern exam. However, when the roof started leaking before he could take his test, they began looking for another place to do it. Bennett found a quiet room in psych, but George stepped in to help Richard with the hospital flooding.
Dr. Bennett Epstein acted as a proctor when George O'Malley took his intern exam for the second time. He followed George around all day looking for a room while the hospital was flooded but eventually Richard Webber acted as the proctor in an OR gallery.