Guest Stars Jesse Williams as Dr. Jackson Avery Sarah Drew as Dr. April Kepner Robert Baker as Dr. Charles Percy Nora Zehetner as Dr. Reed Adamson Michael O'Neill as Gary Clark Mandy Moore as Mary Portman Ryan Devlin as Bill Portman Tom Irwin as Officer Hancock Co Starring Mark Saul as Dr. Steve Mostow Maurice Irvin as Nurse Tyler Christian Gloria Garayua as Dr. Graciella Guzman Arlene Santana as Nurse Kelsey Scott as Karen Campbell Adam Shapiro as Pete Jason Graham as Ken Campbell China Anderson as Ruby Campbell Jeanette Brox as Shelley Ingrid Walters as Nurse Vivian Sara Giller as Waitress Angelina Hong as Sobbing Woman