Karl Kennedy: I don't think you understand what it's like to lose a patient. Particularly one you can't do anything for. There's all sorts of feelings of guilt, there's helplessness...
Susan Kennedy: You think I don't know about those feelings? My mother's death taught me everything I need to know about guilt and helplessness and resentment.
Karl Kennedy: Well I'm sorry I don't see how your mother's death can possibly compare...
Susan Kennedy: Because, Karl, I helped her to die!