Special Guest Stars Kate Walsh as Dr. Addison Forbes Montgomery Guest Stars Lauren Stamile as Nurse Rose Amy Madigan as Dr. Katharine Wyatt Jason O'Mara as Phillip Robinson Clea DuVall as Jennifer Robinson Kathleen Rose Perkins as Sarah Sam Daly as Will Jones Meg Cionni as Nikki Jones Ken Barnett as Freddie Co Starring Molly Kidder as Dr. Megan Nowland Gloria Garayua as Dr. Graciella Guzman Winston Story as Dr. Leo Byrider Tymberlee Hill as Intern Claire John O'Brien as Lab Tech Jeffrey Joy Osmanski as Intern Lucy Richard Keith as Intern Mitch