S9, E6: Corday clashes with new surgical resident Paul Nathan (recurring guest star Don Cheadle) regarding his intervention into the treatment of a sickly young woman, Alison (Nora Zimmett), who has signed a "do not resuscitate" order. Abby wonders about the erratic behavior of her visiting brother, Eric (recurring guest star Tom Everett Scott). She also feels conflicted over a nurse's official complaint against Kovac, Abby's former lover. Meanwhile, Pratt comforts Chen after a patient threatens her, and Corday suspects that an unconscious, 14-year-old female patient has been sexually assaulted.