S5, E8: Sadie, one of Meredith's oldest friends, becomes an intern at Seattle Grace; Lexie leads her fellow interns in unorthodox, secretive surgical training; a new surgeon brings rules and order to the OR.
Melissa George
Mary McDonnell
Jeffrey Dean Morgan
August Schellenberg
Ed Lauter
Brandon Scott
Gloria Garayua
Mark Saul
Molly Kidder
Winston Story
Joe Williamson