Overview: Life goes on as the generator fails during a city-wide blackout; Caldwell takes leave to visit a dying friend; Westphall shares a stuck elevator with an Irishman; Dr. Craig and Wade perform emergency surgery; Pru returns to the hospital, as do the Valeres; Rosenthal is subpoenaed; Fiscus finds the emergency romantic; and a man who believes he's a vampire appeals to Morrison and Axelrod for help.