Guest Stars Jesse Williams as Dr. Jackson Avery Sarah Drew as Dr. April Kepner Jason George as Dr. Ben Warren Nora Zehetner as Dr. Reed Adamson Alan Mandell as Henry Stamm Marion Ross as Betty Donahue Jonathan Goldstein as Ken May Austin Highsmith Garces as Amber Courier Emily Bergl as Trisha Demi Lovato as Hayley May Amy Farrington as Mary May Co Starring Mark Saul as Dr. Steve Mostow Gloria Garayua as Dr. Graciella Guzman Regi Davis as Dr. Kevin Fisher Denice J. Sealy as Nurse
