Special Guest Stars Kate Walsh as Dr. Addison Forbes Montgomery Guest Stars Kate Burton as Dr. Ellis Grey Loretta Devine as Adele Webber Robert Baker as Dr. Charles Percy Co Starring Nicole Rubio as Paramedic Nicole Cummins Teresa Huang as Nurse Ruth Sonya Leslie as Rita Kevin Brief as Barry Taylor Nicole DuPort as Theresa Kayla Madison as Allegra Bryson Thomas as Riley Marilyn McIntyre as Jill Taylor