Stephanie W. Edmonds and Ginny L. Ryan are both doctors. Edmonds, a registered nurse, has a Ph.D., while Ryan is a traditional M.D. But as part of a fight over “scope creep” in health care, many medical doctors might bristle at the idea of calling Edmonds “doctor.” In the last episode of the season, Edmonds and Ryan speak about the health care hierarchy, why calling health care workers by their first names might help patients, the tendency for physicians to mock "noctors," and much more.